Frozen precipitation is measured according to its liquid equivalent: 10 cm of snow is usually about 10 mm . THE FARM. Very heavy rain terminology can be used when the precipitation rate is between 16 millimetres (0.63 in) and 50 millimetres (2.0 in) per hour. The average yearly rainfall on earth is a bit less than a meter. Once you've found your ideal destination, head over to our travel deals and discounts section for the latest online offers from leading holiday companies, airlines, and more. This is how drop size is estimated. As for the rest. Rainfall and river flow: 20 to 26 July 2022 PDF, 927 KB, 4 pages This file may not be suitable for users of assistive technology. Mean Sea Level Pressure Calculator (Converter) Advanced Formula, Wind Influence on Reliable Weather Forecasts, All You Ever Wanted to Know About Choosing a Rain Gauge, Rain gauge accuracy and WMO/NWS standards, Guide to rain gauges: types, sizes, benefits and drawbacks, Practical guide to determining Rainfall Rate and Rain Intensity Error, Rain drop size and speed of a falling rain drop, Sensor and Radiation Shield Comparison Calculator for Temperature Error, Correcting measurement errors of Vaisala HMP155 meteorological probe heater. Kirkcudbrightshire. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". Majorca usually gets less than 150mm of rain in the five months from the beginning of May to the end of September, while most islands in the Aegean see less than 50mm over the same period. MeteoWind Compact IoT wireless wind sensor Sigfox message format, MeteoRain wireless rain gauge Sigfox message format, MeteoHelix weather station Sigfox message format, Sigfox Country Frequencies (RC1, RC2, RC3, RC4), Time synchronization setup of the MeteoHelix Sigfox weather station. So there has been 1.8 inches of rain in the last 6 days. National Oceanic and Atmospheric Administration How to turn ON & OFF the MeteoRain IoT Compact wireless rain gauge? 2066.5. For details kindly visit: https://t.co/w8q0AaMm0IReport any severe weather at:https://t.co/5Mp3RKfD4yDownload Damini App for Lightning Alerts:https://t.co/IYCSTf9o1Uhttps://t.co/gRs5rUfLW3 pic.twitter.com/62Dtu9JYId. Meteorologists measure rainfall over a set period of time (usually one year) using a rain gauge . Coming in second for rainfall is Boat Bluff, located along the Inside Passage of BCs central coast.Record Rainfalls. 27,586. List of available downlink commands for MeteoHelix LoRaWAN weather stations, How does MeteoHelix handle time synchronization, Connecting the MeteoHelix weather station to LoRaWAN wireless networks, Simple tips to maximize your LoRaWAN and Sigfox weather station signal strength in the country, Sigfox and LoRaWAN compared to GPRS/GSM/GPRS/LTE/NB-IoT in weather stations, Changing sampling time in Easy MODBUS Viewer. 1/4 (0.25) of an inch of rain - A light rain for 2-3 hours, moderate rain for 30-60 minutes or heavy rain for 15 minutes. Map of projected climate change in Canada. Delhi has also witnessed three heavy rain events this September - 112.1 mm on September 1, 117.7 mm on September 2 and 94.7 mm on September 11 (Saturday) - the highest in the month in a decade. LEGENDS: ORIGINS. Heavy rain: Greater than 4 mm per hour, but less than 8 mm per hour. (0.098 in) - 7.6 mm (0.30 in) or 10 mm (0.39 in) per hour; Heavy rain when the precipitation rate is > 7.6 mm (0.30 . With climate change on a fast track, weather systems are under increasing pressure, leading to more erratic events like extremely heavy rainfall. I'd say anything over 2" (50mm) in 24 hours is fairly rare for a given location away from hilly or mountainous areas in the UK. Does MeteoWind conform to IEC 61400-12-1 MEASNET wind resource assessment requirements? What size meteorological sensor probes can we mount into the MeteoShield Professional? 7 How much rain does Abbotsford BC get a year? How do I tell if my anemometer bearing needs replacing, How to Replace the Cups on a MeteoWind 2 Anemometer, Total weather station solution - Wind, Rain, Temperature, Humidity and Pressure, Upgrading Davis Vantage Pro with a helical MeteoShield Pro for improved response and temperature accuracy. Although there is no marked rainy season, most of the rainfall occurs in summer months. Of which sh ENTER THE MULTIVERSE: THE MOVIE - PART I // THE LEGEND OF SUPACREE: ENTER THE MULTIVERSE. While a significant portion of rain is often drained through the soil and goes to fill up the water table located deep under the ground, it does not always turn out that way during heavy rainfall. The amount of water vapour that a cloud can contain - and therefore the amount of rain that will fall - depends on the air temperature: the higher the temperature, the more water vapour. Heavy rain: Greater than 4 mm per hour, but less than 8 mm per hour. During an El Nino event, which happens every two to seven years, parts of Peru and Ecuador experience much higher than average rainfall for a year or so while at the same time drought conditions prevail in parts of Australia. How to turn ON & OFF the MeteoHelix weather station? The cookies is used to store the user consent for the cookies in the category "Necessary". What hardware is required to install an agricultural weather station? Rain, drops of appreciable size and may be described as small to large drops. We also examine how rain is formed and look at why using average rainfall figures in isolation can be misleading - on that note, don't forget to check out our complete weather parameter series, with even more information on everything from the average maximum temperature to daylight hours and sea temperature. How much rain does Vancouver get per month? Understanding how much rain truly is being received is key to understanding the situation on the ground. Pan India; East and North East Region; North West Region; South Peninsular Region; Get your weekly fix of holiday inspiration from leading travel writers. All NOAA, The Atlantic tropical season continues as the National Hurricane Center is monitoring the track of Nicole as the system tracks westward. Most lawns and turfgrasses need about 1/3-inch or less water per week during cool-to-cold weather, and 1 to 2 inches of water per week during warm-to-hot weather. Moderate rain when the precipitation rate is between 2.5 mm (0.098 in) - 7.6 mm (0.30 in) or 10 mm (0.39 in) per hour. In this way, the size and velocity of each drop passing between the transmitter and the receiver are measured. The UK is known for its rainy weather. A strong cold front moving into the Plains will produce areas of heavy snow across the Intermountain West and Rockies, and will bring a threat of severe storms with . Heavy rain: Greater than 4 mm per hour, but less than 8 mm per hour. Slight rain: Less than 0.5 mm per hour. England is on average the . Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features. An orange alert is issued for extremely bad weather and a red alert signifies that there is a discernible risk to life due to the weather event. By Jacqueline Moore and Steven Sonsino Sorry, the location you searched for was not found. Do you need underlay for laminate flooring on concrete? Request an accessible format. Heavy rainfall is more than 0.30 inches of rain per hour. Heavy rain describes rainfall with a precipitation rate of between 4 millimetres (0.16 in) and 16 millimetres (0.63 in) per hour. Closer to the mountains, North Vancouver gets an estimated average rainfall of 252 cm. How to test an air temperature sensors response time? Raindrop Shape & Size Calculator: How Much Rain is in Each Rain Drop? It can be interpreted as the equivalent hourly rain that would have fallen if the particular short-term rainfall rate remained constant for one hour. Slight rain: Less than 0.5 mm per hour. Heavy rain - rain rate is greater than 7.6 to 50 mm/h (0.3 to 2/hr) or 0.125 to 0.83 mm/min (0.005" to 0.033/min) which for a 0.1 mm resolution rain gauge equals 76 or more full tipping buckets per hour (76+ pulses/hr). The concentration generally decreases as diameters increase. Select a month to see top destinations or search by name to see all months. Other classic Northern Hemisphere winter dry season regions are India, Thailand, Burma, and Vietnam while Bali in Indonesia offers similar 'low sun' weather conditions between June and September, during Bali's Southern Hemisphere winter. Add to that the fact that most of the soil is covered by cement or concrete in urban living areas, significantly reducing the maximum possible drainage area. Ross and Cromarty. Among them, Zhengzhou suffered extremely rare heavy rainfall from 16-17 o'clock, with an hourly rainfall of 201.9 millimeters and heavy water accumulation in many sections. This website uses cookies to improve your experience while you navigate through the website. The average annual rainfall in the UK is around 1154 mm. Bob says rain is measured in a rain gauge its depth is measured in millimetres (mm). Suppose that during one month, a certain area receives a total amount of rain water of 100 mm (100 mm/month). Most of the eastern half of the country has between 750 and 1000 millimetres (mm) of rainfall in the year. Very heavy rain: Greater than 8 mm per hour. Rain: 0.5-1 mm/h. Providing up-to-date information on climate variability related to the ENSO climate cycle for their respectable regions. On average, October is the wettest month with 93 mm (3.7 inch) of precipitation. You also have the option to opt-out of these cookies. A yellow cell indicates a probable monthly record for this site (sites with 10 years of records only). Buteshire. What is causing the plague in Thebes and how can it be fixed? Rainfall is often expressed in millimetres per day (mm/day) which represents the total depth of rainwater (mm), during 24 hours. Looking at two of the examples above, Lima has 3mm of rain normally during August and two days in the month when some rainfall is recorded but there is only one hour of sunshine a day on average. Rime Icing and Hoar Frost Damage to Anemometers and Meteorological Instruments, Difference between cumulative and event based rain display on allMeteo.com portal, Change rain gauge resolution and rain display settings for the MeteoHelix personal weather station, How to assemble a MeteoShield Professional by BARANI DESIGN Technologies, How to connect RainWise rain gauges to MeteoHelix personal weather stations, How to connect Davis rain gauges to MeteoHelix personal weather stations. The 1981-2010 long-term mean annual rainfall total is 2165.9mm. The humidity level in the air has been recorded from 74 to 95 per cent. Very heavy rain: Greater than 8 mm per hour. 1858.1. The sun is so strong that it evaporates practically all the moisture from the ground and the vegetation, and the landscape becomes parched. Details These reports collect. the critical path of the project was delayed by 4 days in January due to heavy rains. Inverness. Similar Datasets Rainfall - Monthly Total National Environment Agency / 13 Jul 2022 The total monthly rainfall recorded at the Changi Climate Station. 10 mm in 12 hours = .83 mm per hour = .83 litres per hour per square metre. What is the lifetime of a humidity sensor and service/replacement interval. After intense heatwaves, the world is now struggling with heavy rainfall and floods. In Ontario, the average annual temperature is 17.0 C | 62.6 F. Water flowing at the steady rate of 1 cubic mile per day is equivalent to: 764.6 million gallons per minute; 1.1 trillion gallons per day; 1.7 million cubic feet per day; or 3.38 million acre-feet of water per day. Meteorologists measure rain volume received in a unit of time. Both influence our lifestyle. What is the average rainfall in Vancouver BC? Monthly rainfall typically dips to 50mm or less, and this can be seen in the figures all across the Caribbean from Christmas onwards - an ideal time to travel there because, unlike in Peru, it is also sunny at this time of year. Pacific ENSO Applications Climate ServicesPacific ENSO Applications Climate Services2525 Correa Rd. Here's how it works. The estimated annual rainfall of Vancouver is 146 cm. This cookie is set by GDPR Cookie Consent plugin. These cookies ensure basic functionalities and security features of the website, anonymously. Chance of rainfall, likely precipitation and a live rain gauge for each location. The average rainfall in most rain forests is very heavy, about 200-450 centimeters (80-180 inches) per year. Rainfall amount is described as the depth of water reaching the ground, typically in inches or millimeters (25 mm equals one inch). According to MANOBS (Manual of Surface Weather Observations), the following general categories are used to classify rainfall intensity, which is determined by the rainfall rate: Light rain - less than 2.5 mm/h (<0.1/hr) or <0.04 mm/min (<0.0007/min) rain rate, which for a 0.1 mm (0.004) resolution rain gauge is 25 full tipping buckets per hour (25 pulses/hr). Violent rain: Can sometimes be used to characterize precipitation rates grater than >50mm/hr (>2 in/hr) or >0.83 mm/min (>0.033/min) which for a 0.1 mm resolution rain gauge equals 500 or more full tipping buckets per hour (500+ pulses/hr, 8+ pulses/minute). While in Orlando in August, there's both high levels of rainfall and long periods of sunshine. The cookie is used to store the user consent for the cookies in the category "Analytics". Moderate rain: Greater than 0.5 mm per hour, but less than 4.0 mm per hour. 10. How much of water does 1 mm of rain mean? These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. Heavy rain: Greater than 4 mm per hour, but less than 8 mm per hour. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. Except when the rain is heavy, it does not reduce visibility as much as does drizzle. Bob says rain is measured in a rain gauge its depth is measured in millimetres (mm). However, even the 150mm of rain Majorca sees from May to September is hopelessly inadequate to prevent drought setting in. How many days a year on average does it rain in the UK? Is it more effective to workout in the morning or afternoon? Traffic also slowed down at Minto Road. 2.0 2017-3. How much rain does Vancouver get per month? Evaluation of MeteoWind sensors to compared to NRG and Thies 1st Class anemometer and wind vane? Manual Rain Gauge . Approximately 505,000 cubic kilometres (121,000 cu mi) of water falls as precipitation each year; 398,000 cubic kilometres (95,000 cu mi) of it over the oceans. Unlike some other weather parameters, such as temperature, rainfall is much more variable, which can have a significant ripple effect from either too much or too little rain. This process is called 'convective rainfall' and is a common cause of afternoon showers throughout the tropics. Violent rain: If 2" of rain have fallen in 10 minutes, then the equivalent rainfall rate in terms of in/hr will be 60 min / 10 min * 2" of rain = 12 in/hr. Rainfall - Monthly Maximum Daily Total Can the MeteoWind wind sensors be mounted on all existing Towers? On average, over the area you're talking about, each square millimeter has received one cubic millimeter of rain. Why is average rainfall important to holidaymakers. Correct and wrong way to mount your weather station. What Impact Energy from Hail Stone should Meteorological Instruments be able to Survive? Rainfall is often expressed in millimetres per day (mm/day) which represents the total depth of rainwater (mm), during 24 hours. The wet, or rainy, season is the time of year, covering one or more months, when most of the average annual . Merionethshire. US Dept of Commerce What characteristics allow plants to survive in the desert? On average, February is the driest month with 50 mm (2 inch) of precipitation. Does MeteoWind 2-in-1 wind speed & direction sensor satisfy the sensor separation requirement on wind resource assessment towers? By CNBCTV18.com Jul 23, 2021, 08:11 PM IST (Published) Mini Mathematically speaking, 1 mm of rain translates to 1 litre of water in a single metre square. The liters of rainfall measurement is actually liters/square meter (L/m 2 ). Or, 140 mm rainfall can fill an average cricket stadium with 23.8 lakh litres of water! Many different types of rain-gauge have been designed and used, most consisting of a circular collector, delineating the area of the sample, and a . APH DFDS English Heritage First Choice Forest Holidays Holiday Autos Iberostar Jet2holidays lastminute.com Love Holidays Marella Cruises Mercury Holidays Neilson Saga Holidays Sandals Travelodge TUI Virgin Atlantic Warner Leisure Hotels Wendy Wu Tours More We help you find the best travel deals for your holiday in the sun by sharing tips on when and where to go, before providing you with top discounts. The short answer is no. Current Nowcast at 1645IST today. A quick look at the rainfall figures for each destination will show how evenly rainfall is spread through the year. Coastal areas, especially those along the Gulf of Mexico, experience the largest amounts of rain in September. For many years the Met Office has used a tipping-bucket rain-gauge for the automatic measurement of rainfall rate. The number of years of records available for the relevant field for this month is indicated in black. Inverness. Examples of this may be an average of 0.05 inches of rain on a specific date or an average of 10 inches of rain for a specific month, all of which is based on 30 years of data. The field of Dimensional Analysis deals with questions like this. Often, instantaneous rainfall intensity or instantaneous rain rate is given in units of mm/hr even though the measurement period was much shorter than one hour. This is essentially a circular funnel with a diameter of 203 mm which collects the rain into a graduated and calibrated cylinder. 1771.2. Is 600 mm of rain a lot? How many times does it rain in the rainforest? For practical advice on determining and calculating precipitation intensity with the least possible error, please read the following guide: Practical Guide to Determining Rainfall Rate and Rain Intensity Error. Tabasco typically records more than 300 millimeters (11.8 in) of rain during that month. All values are minimum/maximum estimated rain, snow or sleet for one hour: Light rain: At least 0.1 mm/h. The figures we show for rainfall are the amounts of rain that normally fall during each month, based on 30 years of daily weather observations. What is the maximum acceptable air temperature error in meteorology and climate monitoring? 2274.9. However, if there's a wet or dry summer, rainfall can sometimes be more than double the average or way below, which makes a huge difference not only to our daily lives but to everything from farming to wildlife. Moderate rain: Greater than 0.5 mm per hour, but less than 4.0 mm per hour. Sometimes heavy rains turn streets into rivers, but meteorologists say that there is 'only' 15 mm of rain. The country you are connecting from is not in your country list, Changing the rain gauge resolution: decoding the MeteoHelix message format. Dunbartonshire. Please Contact Us. This is one reason why it tends to rain more heavily in the tropics, and why cooler destinations like the UK often get a lot of drizzle. 2034.8. NWS So, if you need to assess what role rainfall might play in your holiday you need to look at other weather parameters as well, such as the amount of sunshine your destination gets in the month, and the number days in the month when some rainfall is recorded. Many of our brief fall-and-winter rainstorms in California Mediterranean-climate areas produce anywhere from about 1/20 of an inch of water to a third or half-an-inch of water. The figures, therefore, should give you some indication of what the landscape will be like; heading to Sicily at the end of the dry summer season? Moderate rain - rain rate of fall is 2.6 to 7.5 mm/h (0.1 to 0.3/hr) or 0.04 to 0.125 mm/min (0.0017 to 0.005/hr), which for a 0.1 mm resolution rain gauge equals 26 to 75 full tipping buckets per hour (26 to 75 pulses/hr). Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. 589.6. Location. . Light rainfall is considered less than 0.10 inches of rain per hour. The lowest level of rainfall was recorded in April 2021, at 20.1 millimeters. In the tropics, dry seasons occur during the 'low sun' or 'winter' season, when the heat of the sun is insufficient to produce convective rainfall (described above). In regions of the world which are naturally very dry, such as in a desert, years can pass with no rain at all. Heavy rainfall is more than 0.30 inches of rain per hour. So, do look too at the sunshine figures. MeteoTemp & MeteoWind RS-485 Wire Colors and Electrical Connection, Website widget for allMETEO weather stations, Heated Anemometer MeteoWind 2 Wiring Connection and Heater Control. The cause of the dry season in the Mediterranean in summer is the dominance of high pressure at this time of year. Daily. Expect arid conditions, while visit in the spring and it is surprisingly green. [1 A day is considered to have "rained" if the total rainfall for that day is 0.2mm or more.] City Inches Millimetres Abbotsford, British Columbia 60.5 1538 St. Johns, Newfoundland 60.4 1534 Halifax, Nova Scotia 57.8 1468 Vancouver, British Columbia 57.3 1457. by Liz Osborn CurrentResults.com. . The average playing area of a cricket stadium is 17,000 m, and with 140 mm of rain, the stadium would be flooded with 23.8 lakh litres of water. An easy way to log data from multiple MODBUS parameters. Meanwhile, a powerful storm was affecting much of the west with heavy snow, high winds and coastal impacts through the middle of this week. Rainfall in Ireland. Rainfall (mm) Argyllshire. The collecting funnel has a sampling area of 750 cm2, the rim is set 450 mm above the surrounding ground level and a mechanism records an event each time a rainfall increment of 0.2 mm has been detected. The year with the greatest number of rain days was 2000, when 178.5 days had at least 1 mm of rain. For example, at 0 C, a cubic meter of air is saturated with 5 grams of water. Some areas, however, get as much as 1000 centimeters (400 inches) of rain per year! Tropical cyclones enhance precipitation . How co connect a rain gauge cable to the SEB200 and SEB50 rain gauge? This cookie is set by GDPR Cookie Consent plugin. Australian rain forecasts updated daily. Mean rainfall (mm) The arithmetically averaged total amount of precipitation recorded during a calendar month or year. By clicking Accept All, you consent to the use of ALL the cookies. "Rain" day is usually defined and I think it is based on amount of rainfall which restricts . 2 How many mm of rain does Vancouver get a year? 7 fantastically festive European Christmas markets, Best snorkelling & diving spots in St Lucia, First Choice: 200 off summer long haul + late deals, Travel Republic: up to 50% off summer 2023 holidays, TUI: up to 200 off holidays in 2023/2024, Exclusive - 40% off Covid-19 PCR Fit to Fly pre-departure tests, Jet2holidays: Book summer 2023 at today's prices, Best Western Hotels: 2 nights for price of 1, Where to find Gran Canaria's most fabulous beaches, Cultural Cape Verde: discover the islands' history, music & more, British Airways to increase Bermuda & Cayman Islands flights, Emirates to offer daily flights from Newcastle from 1 December 2022, Jet2 & Jet2holidays add 45,000 extra seats for October half-term 2023, National Holidays unveils more than 40 new breaks for 2023, Newmarket Holidays adds Mexico & Africa tours for 2023, Visa-free travel to Japan boosts Wendy Wu Tours. Anyone living in the UK will feel confident that they know what rainfall is, having had extensive first hand experience, but do you know how rain is formed? How to Connect MeteoRain 200 Compact Rain Gauge to any Weather Station. This is done to standardize the unit of measure to enable easy comparison of rainfall intensities worldwide. Meteorologists classify rain according to its rate of fall. jbarba (Chemical) 17 Feb 03 08:46. Rainfall Recorded from 0830 hrs of 04-11-2022 to 0830 hrs of 05-11-2022 All India Districts; State-wise Districts; Meteorological Sub-divisions; States; River Basins; Rainfall Statistics; Region-Wise Rainfall Maps . What is the difference between METAR and AUTO-METAR? Updated on September 02, 2018. wet 5-10mm. The average amount of annual precipitation is: 810 mm (31.9 inch) Weather Forecasts for Manchester (Greater Manchester) Show in Fahrenheit MON Oct 31 15C | 11C SSE 24 kmph 1.9 mm Given the Earths surface area, that means the globally averaged annual precipitation is 990 millimetres (39 in). According to the annual average data, the annual rainfall in Beijing is m Both mean and median (decile 5) rainfall are included in these statistics, although from the meteorological point of view the median is usually the preferred measure of 'average' or 'typical' rainfall. The hottest month is June, where average highs routinely exceed 38 C (100.4 F). Does the Vaisala HMP155 meteorological probe fit into the MeteoShield Professional? Rainy days The British Isles are known for their wet weather, and in 2021 there were approximately 149 raindays in. What is the WMO Requirement for Data Reporting Time Interval of Weather Stations? MetService communications meteorologist Lisa Murray. In some regions of the world, fluctuations in global weather patterns play a role in this respect, the best known being El Nino in the Pacific Ocean. Rainfall can also occur when the warming action of the sun heats the earth or the sea enough for the air above it to rise and expand to the point where clouds form and rise further until they cool enough for rain to fall. Rainfall is plentiful in Singapore and it rains an average of 167 days 1 of the year. It does not store any personal data. 'ang on a mo, I'll just take some bearings. Rainfall in the west generally averages between 1000 and 1250 mm. While Western Europe, specifically parts of Germany, Netherlands, and Belgium received upwards of 140 mm of rainfall leading to devastating floods that killed hundreds, areas in China received over 600 mm of rain over a few days, the equivalent of the higher end of rainfall received in a year. Rainfall amount is described as the depth of water reaching the ground, typically in inches or millimeters (25 mm equals one inch). This data is intended to supply information for the benefit of those involved in such climate-sensitive sectors as civil defense, resource management, and developmental planning in the various jurisdictions of the USAPI. In the north, winters are long and cold with lots of snow, and summers are short. 584.9. "One millimeter of rain" is actually one cubic millimeter per square millimeter. Further upstream, another strong storm will affect Alaska with heavy precipitation, strong winds and coastal hazards. How does MeteoWind sensor configuration compare to the IEC 61400-12-1 requirement? For example, in Lima, Peru during August there is hardly a drop of rain but there's also very little sunshine. Small puddles would form but usually disappear after a short while. Majorca usually gets less than 150mm of rain in the five months from the beginning of May to the end of September, while most islands in the Aegean see less than 50mm over the same period. 4-20mA Current Loop Sensor with EasyLogGSM, Geopotential Height Calculator for use in Meteorology and Aviation. How to mount a MeteoHelix IoT Pro weather station or MeteoShield? Rainfall rate quantifies the amount of rain that has fallen per unit time and is usually given in units of mm/hr or in/hr (millimeters per hour or inches per hour) of rainfall in meteorology or climatology. Once summer is over the rains return. Heavy rain: 1 mm/h and up. Moderate rain: Greater than 0.5 mm per hour, but less than 4.0 mm per hour. It's also definitely worth using our weather comparison tool, not to mention reading more about the other weather parameters such as days with rain (yes, this is something different), UV risks, daylight hours, tropical storm risk, and more.