Average Weather in April in Castlemartin United Kingdom
Daily high temperatures increase by 4°F, from 50°F to 53°F, rarely falling below 46°F or exceeding 59°F.
Daily low temperatures increase by 3°F, from 43°F to 46°F, rarely falling below 37°F or exceeding 51°F.
For reference, on August 6, the hottest day of the year, temperatures in Castlemartin typically range from 57°F to 64°F, while on February 18, the coldest day of the year, they range from 40°F to 47°F.
Average High and Low Temperature in April
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on April. 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 April
The month of April in Castlemartin experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 54% throughout the month.
The clearest day of the month is April 14, with clear, mostly clear, or partly cloudy conditions 48% of the time.
For reference, on January 6, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 65%, while on July 17, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 54%.
Cloud Cover Categories in April
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 Castlemartin, the chance of a wet day over the course of April is decreasing, starting the month at 30% and ending it at 26%.
For reference, the year's highest daily chance of a wet day is 46% on November 10, and its lowest chance is 25% on April 23.
Probability of Precipitation in April
The average sliding 31-day rainfall during April in Castlemartin is gradually decreasing, starting the month at 2.2 inches, when it rarely exceeds 3.8 inches or falls below 0.6 inches, and ending the month at 1.8 inches, when it rarely exceeds 3.3 inches or falls below 0.5 inches.
Average Monthly Rainfall in April
Over the course of April in Castlemartin, 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, 51 minutes, implying an average daily increase of 3 minutes, 49 seconds, and weekly increase of 26 minutes, 41 seconds.
The shortest day of the month is April 1, with 12 hours, 59 minutes of daylight and the longest day is April 30, with 14 hours, 49 minutes of daylight.
Hours of Daylight and Twilight in April
The latest sunrise of the month in Castlemartin is 6:54 AM on April 1 and the earliest sunrise is 1 hour, 2 minutes earlier at 5:53 AM on April 30.
The earliest sunset is 7:53 PM on April 1 and the latest sunset is 49 minutes later at 8:42 PM on April 30.
Daylight saving time is observed in Castlemartin during 2021, but it neither starts nor ends during April, so the entire month is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 5:01 AM and sets 16 hours, 40 minutes later, at 9:41 PM, while on December 21, the shortest day of the year, it rises at 8:24 AM and sets 7 hours, 48 minutes later, at 4:12 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in April
The figure below presents a compact representation of key lunar data for April 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 April
The chance that a given day will be muggy in Castlemartin is essentially constant during April, remaining around 0% throughout.
For reference, on August 20, the muggiest day of the year, there are muggy conditions 0% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in April
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Castlemartin is decreasing during April, decreasing from 15.1 miles per hour to 13.7 miles per hour over the course of the month.
For reference, on January 1, the windiest day of the year, the daily average wind speed is 20.2 miles per hour, while on June 14, the calmest day of the year, the daily average wind speed is 12.2 miles per hour.
Average Wind Speed in April
The wind direction in Castlemartin during April is predominantly out of the west from April 1 to April 16 and the north from April 16 to April 30.
Wind Direction in April
Castlemartin 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 Castlemartin is gradually increasing during April, rising by 2°F, from 47°F to 50°F, over the course of the month.
Average Water Temperature in April
The growing season in Castlemartin typically lasts for 11 months (335 days), from around February 1 to around January 1, rarely starting after March 13, or ending before December 6.
The month of April in Castlemartin is reliably fully within the growing season.
Time Spent in Various Temperature Bands and the Growing Season in April
The average accumulated growing degree days in Castlemartin are essentially constant during April, remaining within 11°F of 22°F throughout.
Growing Degree Days in April
The average daily incident shortwave solar energy in Castlemartin is rapidly increasing during April, rising by 1.6 kWh, from 3.7 kWh to 5.3 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in April
For the purposes of this report, the geographical coordinates of Castlemartin are 51.645 deg latitude, -5.017 deg longitude, and 177 ft elevation.
The topography within 2 miles of Castlemartin contains only modest variations in elevation, with a maximum elevation change of 262 feet and an average elevation above sea level of 124 feet. Within 10 miles also contains only modest variations in elevation (371 feet). Within 50 miles contains only modest variations in elevation (1,752 feet).
The area within 2 miles of Castlemartin is covered by grassland (87%) and cropland (13%), within 10 miles by water (55%) and grassland (32%), and within 50 miles by water (79%) and grassland (17%).
This report illustrates the typical weather in Castlemartin, 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 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Castlemartin.
For each station, the records are corrected for the elevation difference between that station and Castlemartin 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 Castlemartin is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Castlemartin and a given station.
Time zones for airports and weather stations are provided by AskGeo.com .