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Average Weather in Les Houches France

In Les Houches, the summers are cool, the winters are freezing and snowy, and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 13°F to 68°F and is rarely below 4°F or above 76°F.

Climate Summary

freezingvery coldcoldcoolcomfortablecoolcoldvery coldfreezingJanFebMarAprMayJunJulAugSepOctNovDec62%62%38%38%overcastclearprecipitation: 3.3 inprecipitation: 3.3 in2.3 in2.3 inmuggy: 0%muggy: 0%drydrytourism score: 5.9tourism score: 5.90.00.0
Click on each chart for more information.

Based on the tourism score, the best time of year to visit Les Houches for warm-weather activities is from early July to mid August.

Temperature

The warm season lasts for 3.5 months, from May 30 to September 13, with an average daily high temperature above 60°F. The hottest day of the year is July 26, with an average high of 68°F and low of 47°F.

The cold season lasts for 3.2 months, from November 21 to February 27, with an average daily high temperature below 35°F. The coldest day of the year is January 12, with an average low of 13°F and high of 27°F.

Average High and Low Temperature

The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature

Average Hourly Temperature in Les HouchesJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMfreezingfreezingvery coldvery coldcoldcoolcomfortable
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < very cold < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The shaded overlays indicate night and civil twilight.

Smithers, Canada (4,985 miles away) and Mountain Village, Colorado, United States (5,377 miles) are the far-away foreign places with temperatures most similar to Les Houches (view comparison).

Clouds

In Les Houches, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.

The clearer part of the year in Les Houches begins around June 21 and lasts for 2.8 months, ending around September 16. On July 23, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 62% of the time, and overcast or mostly cloudy 38% of the time.

The cloudier part of the year begins around September 16 and lasts for 9.2 months, ending around June 21. On May 9, the cloudiest day of the year, the sky is overcast or mostly cloudy 62% of the time, and clear, mostly clear, or partly cloudy 38% of the time.

Cloud Cover Categories

Cloud Cover Categories in Les HouchesclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jul 2362%Jul 2362%May 938%May 938%Jun 2150%Jun 2150%Sep 1650%Sep 1650%clearmostly clearpartly cloudymostly cloudyovercast
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Les Houches varies throughout the year.

The wetter season lasts 8.0 months, from May 1 to January 1, with a greater than 32% chance of a given day being a wet day. The chance of a wet day peaks at 40% on May 26.

The drier season lasts 4.0 months, from January 1 to May 1. The smallest chance of a wet day is 23% on March 5.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation in Les Houches changes throughout the year.

Rain alone is the most common for 7.9 months, from March 11 to November 7. The highest chance of a day with rain alone is 39% on June 3.

Snow alone is the most common for 3.7 months, from November 17 to March 11. The highest chance of a day with snow alone is 27% on December 24.

Mixed snow and rain is the most common for 1.4 weeks, from November 7 to November 17. The highest chance of a day with mixed snow and rain is 12% on April 1.

Daily Chance of Precipitation

Daily Chance of Precipitation in Les HouchessnowrainsnowJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%May 2640%May 2640%Mar 523%Mar 523%Nov 730%Nov 730%Jan 132%Jan 132%snowrainmixed
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Les Houches experiences significant seasonal variation in monthly rainfall.

The rainy period of the year lasts for 9.9 months, from February 12 to December 7, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around June 4, with an average total accumulation of 3.2 inches.

The rainless period of the year lasts for 2.1 months, from December 7 to February 12. The least rain falls around January 5, with an average total accumulation of 0.2 inches.

Average Monthly Rainfall

The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average liquid-equivalent snowfall.

Snowfall

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. Colder, drier snow tends to be on the higher end of that range and warmer, wetter snow on the lower end.

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Les Houches experiences extreme seasonal variation in monthly liquid-equivalent snowfall.

The snowy period of the year lasts for 7.5 months, from October 1 to May 17, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around December 29, with an average total liquid-equivalent accumulation of 3.0 inches.

The snowless period of the year lasts for 4.5 months, from May 17 to October 1. The least snow falls around July 26, with an average total liquid-equivalent accumulation of 0.0 inches.

Average Liquid-Equivalent Monthly Snowfall

Average Liquid-Equivalent Monthly Snowfall in Les HouchessnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0 in1 in2 in3 in4 in5 in6 in7 inDec 293.0 inDec 293.0 inJul 260.0 inJul 260.0 inOct 10.1 inOct 10.1 inMay 170.1 inMay 170.1 in
The average liquid-equivalent snowfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average rainfall.

Sun

The length of the day in Les Houches varies significantly over the course of the year. In 2018, the shortest day is December 21, with 8 hours, 39 minutes of daylight; the longest day is June 21, with 15 hours, 44 minutes of daylight.

Hours of Daylight and Twilight

Hours of Daylight and Twilight in Les HouchesJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 9 minMar 2012 hr, 9 minMar 2015 hr, 44 minJun 2115 hr, 44 minJun 2112 hr, 11 minSep 2312 hr, 11 minSep 238 hr, 39 minDec 218 hr, 39 minDec 21nightnightday
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise is at 5:41 AM on June 16, and the latest sunrise is 2 hours, 33 minutes later at 8:14 AM on January 1. The earliest sunset is at 4:47 PM on December 11, and the latest sunset is 4 hours, 39 minutes later at 9:27 PM on June 26.

Daylight saving time (DST) is observed in Les Houches during 2018, starting in the spring on March 25, lasting 7.1 months, and ending in the fall on October 28.

Sunrise & Sunset with Twilight and Daylight Saving Time

Sunrise & Sunset with Twilight and Daylight Saving Time in Les HouchesJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 165:41 AMJun 165:41 AM9:27 PMJun 269:27 PMJun 26Dec 114:47 PMDec 114:47 PM8:14 AMJan 18:14 AMJan 1Mar 25DSTMar 25DSTDSTOct 28DSTOct 28daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of the year 2018. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The transitions to and from daylight saving time are indicated by the 'DST' labels.

Humidity

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The perceived humidity level in Les Houches, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, remaining a virtually constant 0% throughout.

Humidity Comfort Levels

Humidity Comfort Levels in Les HouchesJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Jul 30%Jul 30%drydrycomfortablecomfortable
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

Wind

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Les Houches does not vary significantly over the course of the year, remaining within 0.3 miles per hour of 3.9 miles per hour throughout.

Average Wind Speed

Average Wind Speed in Les HouchesJanFebMarAprMayJunJulAugSepOctNovDec0 mph1 mph2 mph3 mph4 mph5 mph6 mphJan 264.2 mphJan 264.2 mphAug 103.6 mphAug 103.6 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The predominant average hourly wind direction in Les Houches varies throughout the year.

The wind is most often from the west for 4.6 months, from April 25 to September 13, with a peak percentage of 45% on July 7. The wind is most often from the south for 7.4 months, from September 13 to April 25, with a peak percentage of 41% on January 1.

Wind Direction

Wind Direction in Les HouchesSWSJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%westsouthnortheast
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Best Time of Year to Visit

To characterize how pleasant the weather is in Les Houches throughout the year, we compute two travel scores.

The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best time of year to visit Les Houches for general outdoor tourist activities is from early July to mid August, with a peak score in the last week of July.

Tourism Score

Tourism Score in Les Houchesbest timeJanFebMarAprMayJunJulAugSepOctNovDec02468105.95.90.00.0 precipitationprecipitationcloudscloudstemperaturetemperaturetourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Les Houches for hot-weather activities is from mid July to early August, with a peak score in the last week of July.

Beach/Pool Score

Beach/Pool Score in Les HouchesJanFebMarAprMayJunJulAugSepOctNovDec02468101.71.70.00.0 precipitationprecipitationcloudscloudstemperaturetemperaturebeach/pool score
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Methodology

For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.

Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.

Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.

Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.

Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.

Growing Season

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season in Les Houches typically lasts for 3.9 months (119 days), from around May 23 to around September 19, rarely starting before May 3 or after June 13, and rarely ending before August 26 or after October 12.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season in Les Houchesgrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%May 2350%May 2350%Sep 1950%Sep 1950%Jun 1390%Jun 1390%Aug 2690%Aug 2690%May 310%May 310%Oct 1210%Oct 1210%0%Dec 40%Dec 4Jul 22100%Jul 22100%frigidfreezingvery coldcoldcoolcomfortable
The percentage of time spent in various temperature bands: frigid < 15°F < freezing < 32°F < very cold < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The black line is the percentage chance that a given day is within the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

Based on growing degree days alone, the first spring blooms in Les Houches should appear around May 30, only rarely appearing before May 18 or after June 15.

Growing Degree Days

Growing Degree Days in Les HouchesJanFebMarAprMayJunJulAugSepOctNovDec0°F200°F400°F600°F800°F1,000°FMay 3090°FMay 3090°FDec 31828°FDec 31828°F
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy experiences extreme seasonal variation over the course of the year.

The brighter period of the year lasts for 3.3 months, from May 9 to August 18, with an average daily incident shortwave energy per square meter above 6.1 kWh. The brightest day of the year is July 6, with an average of 7.2 kWh.

The darker period of the year lasts for 3.3 months, from October 29 to February 9, with an average daily incident shortwave energy per square meter below 2.7 kWh. The darkest day of the year is December 21, with an average of 1.5 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy in Les HouchesbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWh9 kWh10 kWhJul 67.2 kWhJul 67.2 kWhDec 211.5 kWhDec 211.5 kWhMay 96.1 kWhMay 96.1 kWhAug 186.1 kWhAug 186.1 kWhOct 292.7 kWhOct 292.7 kWhFeb 92.7 kWhFeb 92.7 kWh
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Les Houches are 45.890 deg latitude, 6.796 deg longitude, and 5,121 ft elevation.

The topography within 2 miles of Les Houches contains extreme variations in elevation, with a maximum elevation change of 6,194 feet and an average elevation above sea level of 4,633 feet. Within 10 miles also contains extreme variations in elevation (13,999 feet). Within 50 miles also contains extreme variations in elevation (14,967 feet).

The area within 2 miles of Les Houches is covered by trees (57%), grassland (11%), and artificial surfaces (11%), within 10 miles by trees (25%) and bare soil (24%), and within 50 miles by trees (34%) and grassland (22%).

Data Sources

This report illustrates the typical weather in Les Houches, 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 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Les Houches.

For each station, the records are corrected for the elevation difference between that station and Les Houches 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 Les Houches is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Les Houches and a given station.

The stations contributing to this reconstruction are: Aosta Airport (36%, 46 kilometers, east); Annecy-Meythet (31%, 54 kilometers, west); and Sion (32%, 55 kilometers, northeast).

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.

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.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for aiports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.