Average Weather in December in Sourdeval France
Daily high temperatures decrease by 2°F, from 46°F to 44°F, rarely falling below 33°F or exceeding 54°F.
Daily low temperatures are around 36°F, rarely falling below 24°F or exceeding 46°F.
For reference, on August 3, the hottest day of the year, temperatures in Sourdeval typically range from 54°F to 72°F, while on February 8, the coldest day of the year, they range from 33°F to 44°F.
Average High and Low Temperature in December
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on December. 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 December
The month of December in Sourdeval experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 66% to 70%.
The clearest day of the month is December 1, with clear, mostly clear, or partly cloudy conditions 34% of the time.
For reference, on January 4, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 71%, while on July 21, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 62%.
Cloud Cover Categories in December
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 Sourdeval, the chance of a wet day over the course of December is gradually increasing, starting the month at 32% and ending it at 35%.
For reference, the year's highest daily chance of a wet day is 35% on December 30, and its lowest chance is 18% on August 27.
Over the course of December in Sourdeval, the chance of a day with only rain remains an essentially constant 32% throughout, the chance of a day with mixed snow and rain remains an essentially constant 1% throughout, and the chance of a day with only snow remains an essentially constant 1% throughout.
Probability of Precipitation in December
The average sliding 31-day rainfall during December in Sourdeval is essentially constant, remaining about 2.1 inches throughout, and rarely exceeding 3.6 inches or falling below 0.7 inches.
The highest average 31-day accumulation is 2.1 inches on December 16.
Average Monthly Rainfall in December
Over the course of December in Sourdeval, the length of the day is gradually decreasing. From the start to the end of the month, the length of the day decreases by 15 minutes, implying an average daily decrease of 31 seconds, and weekly decrease of 3 minutes, 36 seconds.
The shortest day of the month is December 22, with 8 hours, 16 minutes of daylight and the longest day is December 1, with 8 hours, 36 minutes of daylight.
Hours of Daylight and Twilight in December
The earliest sunrise of the month in Sourdeval is 8:34 AM on December 1 and the latest sunrise is 22 minutes later at 8:56 AM on December 31.
The earliest sunset is 5:07 PM on December 10 and the latest sunset is 9 minutes later at 5:16 PM on December 31.
Daylight saving time is observed in Sourdeval during 2019, but it neither starts nor ends during December, so the entire month is in standard time.
For reference, on June 21, the longest day of the year, the Sun rises at 6:00 AM and sets 16 hours, 10 minutes later, at 10:10 PM, while on December 22, the shortest day of the year, it rises at 8:54 AM and sets 8 hours, 16 minutes later, at 5:10 PM.
Sunrise & Sunset with Twilight in December
The chance that a given day will be muggy in Sourdeval is essentially constant during December, remaining around 0% throughout.
For reference, on July 12, the muggiest day of the year, there are muggy conditions 2% of the time, while on October 20, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in December
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Sourdeval is gradually increasing during December, increasing from 12.0 miles per hour to 12.9 miles per hour over the course of the month.
For reference, on January 16, the windiest day of the year, the daily average wind speed is 13.0 miles per hour, while on August 5, the calmest day of the year, the daily average wind speed is 8.9 miles per hour.
Average Wind Speed in December
Wind Direction in December
Sourdeval 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 Sourdeval is gradually decreasing during December, falling by 4°F, from 52°F to 49°F, over the course of the month.
Average Water Temperature in December
The growing season in Sourdeval typically lasts for 6.8 months (207 days), from around April 13 to around November 6, rarely starting before March 26 or after May 1, and rarely ending before October 14 or after December 2.
The month of December in Sourdeval is more likely than not fully outside of the growing season, with the chance that a given day is in the growing season gradually decreasing from 11% to 1% over the course of the month.
Time Spent in Various Temperature Bands and the Growing Season in December
The average accumulated growing degree days in Sourdeval are essentially constant during December, remaining within 3°F of 1,654°F throughout.
Growing Degree Days in December
The average daily incident shortwave solar energy in Sourdeval is essentially constant during December, remaining within 0.1 kWh of 0.9 kWh throughout.
The lowest average daily incident shortwave solar energy during December is 0.8 kWh on December 27.
Average Daily Incident Shortwave Solar Energy in December
For the purposes of this report, the geographical coordinates of Sourdeval are 48.723 deg latitude, -0.922 deg longitude, and 843 ft elevation.
The topography within 2 miles of Sourdeval contains significant variations in elevation, with a maximum elevation change of 607 feet and an average elevation above sea level of 748 feet. Within 10 miles contains significant variations in elevation (1,089 feet). Within 50 miles also contains very significant variations in elevation (1,496 feet).
The area within 2 miles of Sourdeval is covered by grassland (55%) and cropland (37%), within 10 miles by grassland (57%) and cropland (32%), and within 50 miles by cropland (41%) and grassland (38%).
This report illustrates the typical weather in Sourdeval 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 Sourdeval.
For each station, the records are corrected for the elevation difference between that station and Sourdeval 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 Sourdeval is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Sourdeval and a given station.
The stations contributing to this reconstruction are: Caen – Carpiquet Airport (25%, 61 kilometers, northeast); Laval-Entrammes (18%, 78 kilometers, south); Alençon Valframbert Airport (17%, 82 kilometers, east); Dinard–Pleurtuit–Saint-Malo Airport (15%, 86 kilometers, west); Rennes - Saint-Jacques (13%, 94 kilometers, southwest); and Jersey Airport (11%, 108 kilometers, northwest).
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.
Time zones for aiports and weather stations are provided by AskGeo.com .