March Weather in Radyr United Kingdom
Daily high temperatures increase by 4°F, from 47°F to 51°F, rarely falling below 40°F or exceeding 57°F.
Daily low temperatures increase by 2°F, from 38°F to 40°F, rarely falling below 31°F or exceeding 46°F.
For reference, on July 25, the hottest day of the year, temperatures in Radyr typically range from 56°F to 68°F, while on February 7, the coldest day of the year, they range from 37°F to 45°F.
Average High and Low Temperature in March in Radyr
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on March. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.
Average Hourly Temperature in March in Radyr
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The month of March in Radyr experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 63% to 57%.
The clearest day of the month is March 31, with clear, mostly clear, or partly cloudy conditions 43% of the time.
For reference, on December 27, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 68%, while on July 17, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 56%.
Cloud Cover Categories in March in Radyr
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Radyr, the chance of a wet day over the course of March is essentially constant, remaining around 29% throughout.
For reference, the year's highest daily chance of a wet day is 42% on December 29, and its lowest chance is 24% on April 28.
Probability of Precipitation in March in Radyr
To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day rainfall during March in Radyr is essentially constant, remaining about 1.9 inches throughout, and rarely exceeding 3.5 inches or falling below 0.4 inches.
Average Monthly Rainfall in March in Radyr
Over the course of March in Radyr, the length of the day is rapidly increasing. From the start to the end of the month, the length of the day increases by 1 hour, 59 minutes, implying an average daily increase of 3 minutes, 58 seconds, and weekly increase of 27 minutes, 45 seconds.
The shortest day of the month is March 1, with 10 hours, 56 minutes of daylight and the longest day is March 31, with 12 hours, 55 minutes of daylight.
Hours of Daylight and Twilight in March in Radyr
The latest sunrise of the month in Radyr is 6:57 AM on March 1 and the earliest sunrise is 58 minutes earlier at 5:59 AM on March 27.
The earliest sunset is 5:53 PM on March 1 and the latest sunset is 1 hour, 51 minutes later at 7:44 PM on March 31.
Daylight saving time (DST) starts at 2:00 AM on March 28, 2021, shifting sunrise and sunset to be an hour later.
For reference, on June 21, the longest day of the year, the Sun rises at 4:55 AM and sets 16 hours, 39 minutes later, at 9:34 PM, while on December 21, the shortest day of the year, it rises at 8:16 AM and sets 7 hours, 50 minutes later, at 4:05 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in March in Radyr
The figure below presents a compact representation of key lunar data for March 2021. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.
Moon Rise, Set & Phases in March in Radyr
We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.
The chance that a given day will be muggy in Radyr is essentially constant during March, remaining around 0% throughout.
For reference, on August 10, the muggiest day of the year, there are muggy conditions 0% of the time, while on October 2, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in March in Radyr
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.
The average hourly wind speed in Radyr is decreasing during March, decreasing from 13.3 miles per hour to 12.3 miles per hour over the course of the month.
For reference, on January 3, the windiest day of the year, the daily average wind speed is 14.9 miles per hour, while on August 3, the calmest day of the year, the daily average wind speed is 10.4 miles per hour.
Average Wind Speed in March in Radyr
The hourly average wind direction in Radyr throughout March is predominantly from the west, with a peak proportion of 39% on March 8.
Wind Direction in March in Radyr
Radyr is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.
The average surface water temperature in Radyr is essentially constant during March, remaining within 1°F of 46°F throughout.
Average Water Temperature in March in Radyr
Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).
The growing season in Radyr typically lasts for 8.3 months (252 days), from around March 26 to around December 3, rarely starting before February 13 or after April 22, and rarely ending before November 4 or after December 29.
During March in Radyr, the chance that a given day is within the growing season is rapidly increasing rising from 23% to 57% over the course of the month.
Time Spent in Various Temperature Bands and the Growing Season in March in Radyr
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.
The average accumulated growing degree days in Radyr are essentially constant during March, remaining within 5°F of 10°F throughout.
Growing Degree Days in March in Radyr
This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.
The average daily incident shortwave solar energy in Radyr is increasing during March, rising by 1.5 kWh, from 2.1 kWh to 3.6 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in March in Radyr
For the purposes of this report, the geographical coordinates of Radyr are 51.519 deg latitude, -3.258 deg longitude, and 223 ft elevation.
The topography within 2 miles of Radyr contains significant variations in elevation, with a maximum elevation change of 561 feet and an average elevation above sea level of 227 feet. Within 10 miles contains significant variations in elevation (1,312 feet). Within 50 miles contains very significant variations in elevation (2,927 feet).
The area within 2 miles of Radyr is covered by artificial surfaces (46%) and grassland (38%), within 10 miles by grassland (45%) and artificial surfaces (24%), and within 50 miles by grassland (43%) and cropland (22%).
This report illustrates the typical weather in Radyr, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Radyr.
For each station, the records are corrected for the elevation difference between that station and Radyr according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at Radyr is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Radyr and a given station.
The stations contributing to this reconstruction are: Cardiff Airport (EGFF, 81%, 15 kilometers, southwest); Bristol Airport (EGGD, 17%, 40 kilometers, east); and RAF Shawbury (EGOS, 2.5%, 148 kilometers, north).
All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus.
All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.
Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.
Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.
Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .
Time zones for airports and weather stations are provided by AskGeo.com .
Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.
The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.
We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.
We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.