Average Weather in December in Saint-Bon-Tarentaise France
Daily high temperatures decrease by 4°F, from 33°F to 29°F, rarely falling below 21°F or exceeding 40°F.
Daily low temperatures decrease by 4°F, from 19°F to 15°F, rarely falling below 6°F or exceeding 28°F.
For reference, on July 26, the hottest day of the year, temperatures in Saint-Bon-Tarentaise typically range from 47°F to 68°F, while on January 12, the coldest day of the year, they range from 14°F to 29°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 Saint-Bon-Tarentaise experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 50% throughout the month.
The clearest day of the month is December 17, with clear, mostly clear, or partly cloudy conditions 51% of the time.
For reference, on May 9, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 59%, while on July 25, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 67%.
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 Saint-Bon-Tarentaise, the chance of a wet day over the course of December is gradually increasing, starting the month at 26% and ending it at 28%.
For reference, the year's highest daily chance of a wet day is 38% on May 25, and its lowest chance is 21% on March 5.
Over the course of December in Saint-Bon-Tarentaise, the chance of a day with only rain decreases from 4% to 1%, the chance of a day with mixed snow and rain remains an essentially constant 8% throughout, and the chance of a day with only snow increases from 14% to 18%.
Probability of Precipitation in December
The average sliding 31-day rainfall during December in Saint-Bon-Tarentaise is decreasing, starting the month at 0.9 inches, when it rarely exceeds 2.3 inches or falls below 0.1 inches, and ending the month at 0.4 inches, when it rarely exceeds 1.1 inches.
Average Monthly Rainfall in December
We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. As with rainfall, we consider the liquid-equivalent snowfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day liquid-equivalent snowfall during December in Saint-Bon-Tarentaise is gradually increasing, starting the month at 1.4 inches, when it rarely exceeds 3.0 inches or falls below 0.2 inches, and ending the month at 1.9 inches, when it rarely exceeds 3.7 inches or falls below 0.5 inches.
The highest average 31-day liquid-equivalent accumulation is 1.9 inches on December 30.
Average Monthly Liquid-Equivalent Snowfall in December
Over the course of December in Saint-Bon-Tarentaise, the length of the day is essentially constant. The shortest day of the month is December 22, with 8 hours, 43 minutes of daylight and the longest day is December 1, with 8 hours, 59 minutes of daylight.
Hours of Daylight and Twilight in December
The earliest sunrise of the month in Saint-Bon-Tarentaise is 7:52 AM on December 1 and the latest sunrise is 21 minutes later at 8:13 AM on December 31.
The earliest sunset is 4:50 PM on December 10 and the latest sunset is 10 minutes later at 4:59 PM on December 31.
Daylight saving time is observed in Saint-Bon-Tarentaise during 2018, 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 5:44 AM and sets 15 hours, 41 minutes later, at 9:25 PM, while on December 21, the shortest day of the year, it rises at 8:10 AM and sets 8 hours, 43 minutes later, at 4:52 PM.
Sunrise & Sunset with Twilight in December
The chance that a given day will be muggy in Saint-Bon-Tarentaise is essentially constant during December, remaining around 0% throughout.
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 Saint-Bon-Tarentaise is essentially constant during December, remaining within 0.1 miles per hour of 3.9 miles per hour throughout.
For reference, on April 1, the windiest day of the year, the daily average wind speed is 4.3 miles per hour, while on August 10, the calmest day of the year, the daily average wind speed is 3.3 miles per hour.
Average Wind Speed in December
Wind Direction in December
The growing season in Saint-Bon-Tarentaise typically lasts for 4.2 months (128 days), from around May 22 to around September 27, rarely starting before April 30 or after June 11, and rarely ending before September 1 or after October 17.
The month of December in Saint-Bon-Tarentaise is reliably fully outside of the growing season.
Time Spent in Various Temperature Bands and the Growing Season in December
The average accumulated growing degree days in Saint-Bon-Tarentaise are essentially constant during December, remaining around 843°F throughout.
Growing Degree Days in December
The average daily incident shortwave solar energy in Saint-Bon-Tarentaise is essentially constant during December, remaining within 0.1 kWh of 1.7 kWh throughout.
The lowest average daily incident shortwave solar energy during December is 1.6 kWh on December 21.
Average Daily Incident Shortwave Solar Energy in December
For the purposes of this report, the geographical coordinates of Saint-Bon-Tarentaise are 45.434 deg latitude, 6.637 deg longitude, and 5,128 ft elevation.
The topography within 2 miles of Saint-Bon-Tarentaise contains extreme variations in elevation, with a maximum elevation change of 4,882 feet and an average elevation above sea level of 4,384 feet. Within 10 miles also contains extreme variations in elevation (11,112 feet). Within 50 miles also contains extreme variations in elevation (15,108 feet).
The area within 2 miles of Saint-Bon-Tarentaise is covered by trees (70%) and grassland (16%), within 10 miles by trees (34%) and grassland (32%), and within 50 miles by trees (38%) and grassland (23%).
This report illustrates the typical weather in Saint-Bon-Tarentaise 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 Saint-Bon-Tarentaise.
For each station, the records are corrected for the elevation difference between that station and Saint-Bon-Tarentaise 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 Saint-Bon-Tarentaise is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Saint-Bon-Tarentaise and a given station.
The stations contributing to this reconstruction are: Chambéry Airport (19%, 63 kilometers, west); Aosta Airport (26%, 65 kilometers, northeast); Annecy-Meythet (23%, 69 kilometers, northwest); Turin Caselle Airport (19%, 83 kilometers, east); and Château-Arnoux-Saint-Auban Airport (13%, 160 kilometers, south).
Time zones for aiports and weather stations are provided by AskGeo.com .