Average Weather in September in Sourdeval France
Daily high temperatures decrease by 6°F, from 68°F to 63°F, rarely falling below 56°F or exceeding 77°F.
Daily low temperatures decrease by 4°F, from 52°F to 48°F, rarely falling below 41°F or exceeding 58°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 September
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on September. 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 September
The month of September in Sourdeval experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 44% to 50%.
The clearest day of the month is September 9, with clear, mostly clear, or partly cloudy conditions 56% 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 September
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 September is rapidly increasing, starting the month at 20% and ending it at 27%.
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.
Probability of Precipitation in September
The average sliding 31-day rainfall during September in Sourdeval is increasing, starting the month at 1.3 inches, when it rarely exceeds 2.7 inches or falls below 0.3 inches, and ending the month at 1.9 inches, when it rarely exceeds 3.6 inches or falls below 0.5 inches.
Average Monthly Rainfall in September
Over the course of September in Sourdeval, the length of the day is rapidly decreasing. From the start to the end of the month, the length of the day decreases by 1 hour, 42 minutes, implying an average daily decrease of 3 minutes, 31 seconds, and weekly decrease of 24 minutes, 38 seconds.
The shortest day of the month is September 30, with 11 hours, 44 minutes of daylight and the longest day is September 1, with 13 hours, 27 minutes of daylight.
Hours of Daylight and Twilight in September
The earliest sunrise of the month in Sourdeval is 7:20 AM on September 1 and the latest sunrise is 41 minutes later at 8:01 AM on September 30.
The latest sunset is 8:46 PM on September 1 and the earliest sunset is 1 hour, 1 minute earlier at 7:45 PM on September 30.
Daylight saving time is observed in Sourdeval during 2019, but it neither starts nor ends during September, so the entire month is in daylight saving 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 and Daylight Saving Time in September
The chance that a given day will be muggy in Sourdeval is essentially constant during September, remaining around 1% 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 September
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 September, increasing from 9.7 miles per hour to 10.3 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 September
Wind Direction in September
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 September, falling by 3°F, from 65°F to 63°F, over the course of the month.
Average Water Temperature in September
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 September in Sourdeval is reliably fully within the growing season.
Time Spent in Various Temperature Bands and the Growing Season in September
The average accumulated growing degree days in Sourdeval are increasing during September, increasing by 232°F, from 1,276°F to 1,508°F, over the course of the month.
Growing Degree Days in September
The average daily incident shortwave solar energy in Sourdeval is rapidly decreasing during September, falling by 1.6 kWh, from 4.9 kWh to 3.3 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in September
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 .