Average Weather in October in Chens-sur-Léman France
Daily high temperatures decrease by 11°F, from 65°F to 55°F, rarely falling below 46°F or exceeding 74°F.
Daily low temperatures decrease by 8°F, from 50°F to 42°F, rarely falling below 34°F or exceeding 56°F.
For reference, on August 4, the hottest day of the year, temperatures in Chens-sur-Léman typically range from 60°F to 80°F, while on January 15, the coldest day of the year, they range from 31°F to 40°F.
Average High and Low Temperature in October
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on October. 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 October
Carson, Washington, United States (5,344 miles away) and West Jefferson, North Carolina, United States (4,371 miles) are the far-away foreign places with temperatures most similar to Chens-sur-Léman (view comparison).
The month of October in Chens-sur-Léman experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 51% to 56%.
The clearest day of the month is October 1, with clear, mostly clear, or partly cloudy conditions 49% of the time.
For reference, on November 24, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 58%, while on July 21, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 68%.
Cloud Cover Categories in October
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 Chens-sur-Léman, the chance of a wet day over the course of October is essentially constant, remaining around 32% throughout.
For reference, the year's highest daily chance of a wet day is 41% on May 25, and its lowest chance is 26% on March 3.
Probability of Precipitation in October
The average sliding 31-day rainfall during October in Chens-sur-Léman is essentially constant, remaining about 3.5 inches throughout, and rarely exceeding 6.4 inches or falling below 1.2 inches.
The highest average 31-day accumulation is 3.6 inches on October 11.
Average Monthly Rainfall in October
Over the course of October in Chens-sur-Léman, 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, 34 minutes, implying an average daily decrease of 3 minutes, 9 seconds, and weekly decrease of 22 minutes, 3 seconds.
The shortest day of the month is October 31, with 10 hours, 8 minutes of daylight and the longest day is October 1, with 11 hours, 42 minutes of daylight.
Hours of Daylight and Twilight in October
The latest sunrise of the month in Chens-sur-Léman is 8:08 AM on October 27 and the earliest sunrise is 59 minutes earlier at 7:10 AM on October 28.
The latest sunset is 7:15 PM on October 1 and the earliest sunset is 1 hour, 53 minutes earlier at 5:22 PM on October 31.
Daylight saving time (DST) ends at 2:00 AM on October 28, 2018, shifting sunrise and sunset to be an hour earlier.
For reference, on June 21, the longest day of the year, the Sun rises at 5:42 AM and sets 15 hours, 48 minutes later, at 9:30 PM, while on December 21, the shortest day of the year, it rises at 8:15 AM and sets 8 hours, 36 minutes later, at 4:50 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in October
The chance that a given day will be muggy in Chens-sur-Léman is essentially constant during October, remaining around 0% throughout.
For reference, on August 10, the muggiest day of the year, there are muggy conditions 1% 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 October
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Chens-sur-Léman is essentially constant during October, remaining within 0.2 miles per hour of 6.2 miles per hour throughout.
For reference, on April 3, the windiest day of the year, the daily average wind speed is 7.1 miles per hour, while on August 10, the calmest day of the year, the daily average wind speed is 5.8 miles per hour.
The lowest daily average wind speed during October is 6.0 miles per hour on October 3.
Average Wind Speed in October
Wind Direction in October
The growing season in Chens-sur-Léman typically lasts for 7.4 months (227 days), from around March 27 to around November 9, rarely starting before March 3 or after April 19, and rarely ending before October 18 or after December 3.
The month of October in Chens-sur-Léman is more likely than not fully within the growing season, with the chance that a given day is in the growing season rapidly decreasing from 100% to 70% over the course of the month.
Time Spent in Various Temperature Bands and the Growing Season in October
The average accumulated growing degree days in Chens-sur-Léman are gradually increasing during October, increasing by 142°F, from 2,403°F to 2,545°F, over the course of the month.
Growing Degree Days in October
The average daily incident shortwave solar energy in Chens-sur-Léman is decreasing during October, falling by 1.4 kWh, from 3.7 kWh to 2.3 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in October
For the purposes of this report, the geographical coordinates of Chens-sur-Léman are 46.329 deg latitude, 6.263 deg longitude, and 1,230 ft elevation.
The topography within 2 miles of Chens-sur-Léman contains only modest variations in elevation, with a maximum elevation change of 256 feet and an average elevation above sea level of 1,294 feet. Within 10 miles contains only modest variations in elevation (4,003 feet). Within 50 miles also contains extreme variations in elevation (15,112 feet).
The area within 2 miles of Chens-sur-Léman is covered by water (55%), cropland (22%), and trees (14%), within 10 miles by cropland (31%) and water (24%), and within 50 miles by trees (42%) and cropland (21%).
This report illustrates the typical weather in Chens-sur-Léman 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 5 weather stations near enough to contribute to our estimation of the temperature and dew point in Chens-sur-Léman.
For each station, the records are corrected for the elevation difference between that station and Chens-sur-Léman 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 Chens-sur-Léman is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Chens-sur-Léman and a given station.
The stations contributing to this reconstruction are: Aéroport Genève-Cointrin (77%, 16 kilometers, southwest); Sion (7%, 82 kilometers, east); Neuchatel (6%, 91 kilometers, northeast); Dole–Jura Airport (5.0%, 102 kilometers, northwest); and Besançon – La Vèze Aerodrome (4.8%, 105 kilometers, north).
Time zones for aiports and weather stations are provided by AskGeo.com .