Average Weather in May in Mont-de-Lans France
Daily high temperatures increase by 7°F, from 49°F to 57°F, rarely falling below 39°F or exceeding 66°F.
Daily low temperatures increase by 7°F, from 32°F to 39°F, rarely falling below 26°F or exceeding 45°F.
For reference, on August 4, the hottest day of the year, temperatures in Mont-de-Lans typically range from 46°F to 65°F, while on January 18, the coldest day of the year, they range from 14°F to 29°F.
Average High and Low Temperature in May
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on May. 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 May
Girdwood, Alaska, United States (4,990 miles away) and Breckenridge, Colorado, United States (5,248 miles) are the far-away foreign places with temperatures most similar to Mont-de-Lans (view comparison).
The month of May in Mont-de-Lans experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 58% throughout the month. The highest chance of overcast or mostly cloudy conditions is 60% on May 9.
The clearest day of the month is May 31, with clear, mostly clear, or partly cloudy conditions 43% of the time.
For reference, on May 9, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 60%, while on July 21, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 67%.
Cloud Cover Categories in May
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Mont-de-Lans, the chance of a wet day over the course of May is essentially constant, remaining around 31% throughout.
For reference, the year's highest daily chance of a wet day is 32% on May 25, and its lowest chance is 19% on March 5.
Over the course of May in Mont-de-Lans, the chance of a day with only rain increases from 24% to 30%, the chance of a day with mixed snow and rain decreases from 4% to 1%, and the chance of a day with only snow remains an essentially constant 1% throughout.
Probability of Precipitation in May
The average sliding 31-day rainfall during May in Mont-de-Lans is essentially constant, remaining about 2.2 inches throughout, and rarely exceeding 3.9 inches or falling below 0.7 inches.
The highest average 31-day accumulation is 2.4 inches on May 21.
Average Monthly Rainfall in May
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 May in Mont-de-Lans is essentially constant, remaining about 0.2 inches throughout, and rarely exceeding 0.9 inches or falling below -0.0 inches.
Average Monthly Liquid-Equivalent Snowfall in May
Over the course of May in Mont-de-Lans, 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, 6 minutes, implying an average daily increase of 2 minutes, 11 seconds, and weekly increase of 15 minutes, 19 seconds.
The shortest day of the month is May 1, with 14 hours, 16 minutes of daylight and the longest day is May 31, with 15 hours, 22 minutes of daylight.
Hours of Daylight and Twilight in May
The latest sunrise of the month in Mont-de-Lans is 6:25 AM on May 1 and the earliest sunrise is 32 minutes earlier at 5:52 AM on May 31.
The earliest sunset is 8:40 PM on May 1 and the latest sunset is 33 minutes later at 9:14 PM on May 31.
Daylight saving time is observed in Mont-de-Lans during 2018, but it neither starts nor ends during May, so the entire month is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 5:48 AM and sets 15 hours, 37 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, 46 minutes later, at 4:56 PM.
Sunrise & Sunset with Twilight in May
The chance that a given day will be muggy in Mont-de-Lans is essentially constant during May, remaining around 0% throughout.
Humidity Comfort Levels in May
The average hourly wind speed in Mont-de-Lans is essentially constant during May, remaining within 0.1 miles per hour of 5.0 miles per hour throughout.
For reference, on April 15, the windiest day of the year, the daily average wind speed is 5.3 miles per hour, while on August 11, the calmest day of the year, the daily average wind speed is 4.5 miles per hour.
Average Wind Speed in May
Wind Direction in May
The growing season in Mont-de-Lans typically lasts for 3.9 months (119 days), from around May 29 to around September 24, rarely starting before May 7 or after June 22, and rarely ending before August 29 or after October 17.
During May in Mont-de-Lans, the chance that a given day is within the growing season is rapidly increasing rising from 5% to 55% over the course of the month.
Time Spent in Various Temperature Bands and the Growing Season in May
The average accumulated growing degree days in Mont-de-Lans are gradually increasing during May, increasing by 46°F, from 12°F to 58°F, over the course of the month.
Growing Degree Days in May
The average daily incident shortwave solar energy in Mont-de-Lans is gradually increasing during May, rising by 0.8 kWh, from 6.0 kWh to 6.8 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in May
For the purposes of this report, the geographical coordinates of Mont-de-Lans are 45.036 deg latitude, 6.131 deg longitude, and 5,407 ft elevation.
The topography within 2 miles of Mont-de-Lans contains extreme variations in elevation, with a maximum elevation change of 4,623 feet and an average elevation above sea level of 4,744 feet. Within 10 miles also contains extreme variations in elevation (10,620 feet). Within 50 miles also contains extreme variations in elevation (12,759 feet).
The area within 2 miles of Mont-de-Lans is covered by trees (35%), grassland (30%), and sparse vegetation (12%), within 10 miles by grassland (29%) and bare soil (23%), and within 50 miles by trees (42%) and grassland (21%).
This report illustrates the typical weather in Mont-de-Lans 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 7 weather stations near enough to contribute to our estimation of the temperature and dew point in Mont-de-Lans.
For each station, the records are corrected for the elevation difference between that station and Mont-de-Lans 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 Mont-de-Lans is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Mont-de-Lans and a given station.
The stations contributing to this reconstruction are: Chambéry Airport (16%, 70 kilometers, north); Grenoble-Isère Airport (18%, 73 kilometers, northwest); Château-Arnoux-Saint-Auban Airport (15%, 108 kilometers, south); Turin Caselle Airport (13%, 121 kilometers, east); Montélimar-Ancône (11%, 121 kilometers, southwest); Aosta Airport (15%, 123 kilometers, northeast); and Cuneo International Airport (13%, 130 kilometers, southeast).
Time zones for aiports and weather stations are provided by AskGeo.com .