Average Weather in April in Trélex Switzerland
Daily high temperatures increase by 7°F, from 54°F to 61°F, rarely falling below 43°F or exceeding 72°F.
Daily low temperatures increase by 6°F, from 39°F to 44°F, rarely falling below 32°F or exceeding 51°F.
For reference, on August 4, the hottest day of the year, temperatures in Trélex typically range from 58°F to 78°F, while on January 15, the coldest day of the year, they range from 29°F to 38°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 Trélex experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 55% throughout the month.
The clearest day of the month is April 13, with clear, mostly clear, or partly cloudy conditions 47% of the time.
For reference, on November 24, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 59%, while on July 23, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 67%.
Cloud Cover Categories in April
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Trélex, the chance of a wet day over the course of April is gradually increasing, starting the month at 33% and ending it at 35%.
For reference, the year's highest daily chance of a wet day is 42% on May 25, and its lowest chance is 26% on March 3.
Probability of Precipitation in April
The average sliding 31-day rainfall during April in Trélex is gradually increasing, starting the month at 2.9 inches, when it rarely exceeds 5.2 inches or falls below 0.9 inches, and ending the month at 3.2 inches, when it rarely exceeds 5.4 inches or falls below 1.2 inches.
Average Monthly Rainfall in April
Over the course of April in Trélex, 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, 31 minutes, implying an average daily increase of 3 minutes, 8 seconds, and weekly increase of 21 minutes, 58 seconds.
The shortest day of the month is April 1, with 12 hours, 49 minutes of daylight and the longest day is April 30, with 14 hours, 20 minutes of daylight.
Hours of Daylight and Twilight in April
The latest sunrise of the month in Trélex is 7:15 AM on April 1 and the earliest sunrise is 52 minutes earlier at 6:23 AM on April 30.
The earliest sunset is 8:03 PM on April 1 and the latest sunset is 39 minutes later at 8:42 PM on April 30.
Daylight saving time is observed in Trélex during 2018, 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 5:42 AM and sets 15 hours, 49 minutes later, at 9:31 PM, while on December 21, the shortest day of the year, it rises at 8:15 AM and sets 8 hours, 35 minutes later, at 4:50 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in April
The chance that a given day will be muggy in Trélex is essentially constant during April, remaining around 0% throughout.
For reference, on July 14, 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
The average hourly wind speed in Trélex is gradually decreasing during April, decreasing from 7.7 miles per hour to 6.9 miles per hour over the course of the month.
For reference, on April 3, the windiest day of the year, the daily average wind speed is 7.7 miles per hour, while on August 10, the calmest day of the year, the daily average wind speed is 6.2 miles per hour.
The highest daily average wind speed during April is 7.7 miles per hour on April 3.
Average Wind Speed in April
Wind Direction in April
The growing season in Trélex typically lasts for 7.1 months (216 days), from around April 4 to around November 6, rarely starting before March 12 or after April 25, and rarely ending before October 18 or after November 30.
During April in Trélex, the chance that a given day is within the growing season is very rapidly increasing rising from 43% to 95% over the course of the month.
Time Spent in Various Temperature Bands and the Growing Season in April
The average accumulated growing degree days in Trélex are gradually increasing during April, increasing by 93°F, from 38°F to 130°F, over the course of the month.
Growing Degree Days in April
The average daily incident shortwave solar energy in Trélex is increasing during April, rising by 1.1 kWh, from 4.4 kWh to 5.5 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 Trélex are 46.415 deg latitude, 6.208 deg longitude, and 1,670 ft elevation.
The topography within 2 miles of Trélex contains very significant variations in elevation, with a maximum elevation change of 1,027 feet and an average elevation above sea level of 1,686 feet. Within 10 miles contains very significant variations in elevation (4,275 feet). Within 50 miles also contains extreme variations in elevation (13,392 feet).
The area within 2 miles of Trélex is covered by cropland (71%), trees (15%), and artificial surfaces (14%), within 10 miles by trees (38%) and cropland (22%), and within 50 miles by trees (42%) and cropland (23%).
This report illustrates the typical weather in Trélex year round, 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 6 weather stations near enough to contribute to our estimation of the temperature and dew point in Trélex.
For each station, the records are corrected for the elevation difference between that station and Trélex 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 Trélex is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Trélex and a given station.
The stations contributing to this reconstruction are: Aéroport Genève-Cointrin (63%, 21 kilometers, south); Neuchatel (8%, 86 kilometers, northeast); Les Eplatures (7%, 87 kilometers, northeast); Sion (8%, 88 kilometers, east); Dole–Jura Airport (7%, 91 kilometers, northwest); and Besançon – La Vèze Aerodrome (7%, 94 kilometers, north).
Time zones for aiports and weather stations are provided by AskGeo.com .