Average Weather in Praz-sur-Arly France
In Praz-sur-Arly, the summers are comfortable, the winters are freezing and snowy, and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 15°F to 69°F and is rarely below 6°F or above 78°F.
Based on the tourism score, the best time of year to visit Praz-sur-Arly for warm-weather activities is from early July to mid August.
The warm season lasts for 3.4 months, from June 1 to September 13, with an average daily high temperature above 61°F. The hottest day of the year is July 26, with an average high of 69°F and low of 48°F.
The cold season lasts for 3.1 months, from November 21 to February 26, with an average daily high temperature below 36°F. The coldest day of the year is January 12, with an average low of 15°F and high of 29°F.
Average High and Low Temperature
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
In Praz-sur-Arly, 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 Praz-sur-Arly begins around June 20 and lasts for 2.9 months, ending around September 16. On July 21, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 66% of the time, and overcast or mostly cloudy 34% of the time.
The cloudier part of the year begins around September 16 and lasts for 9.1 months, ending around June 20. On May 8, the cloudiest day of the year, the sky is overcast or mostly cloudy 60% of the time, and clear, mostly clear, or partly cloudy 40% of the time.
Cloud Cover Categories
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. The chance of wet days in Praz-sur-Arly varies throughout the year.
The wetter season lasts 8.1 months, from April 29 to January 1, with a greater than 31% chance of a given day being a wet day. The chance of a wet day peaks at 39% on May 25.
The drier season lasts 3.9 months, from January 1 to April 29. The smallest chance of a wet day is 23% on March 3.
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 Praz-sur-Arly changes throughout the year.
Rain alone is the most common for 8.4 months, from March 7 to November 17. The highest chance of a day with rain alone is 38% on June 3.
Snow alone is the most common for 3.3 months, from November 17 to February 25. The highest chance of a day with snow alone is 24% on December 24.
Mixed snow and rain is the most common for 1.4 weeks, from February 25 to March 7. The highest chance of a day with mixed snow and rain is 11% on February 17.
Daily Chance of Precipitation
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. Praz-sur-Arly experiences significant seasonal variation in monthly rainfall.
The rainy period of the year lasts for 10 months, from February 4 to December 17, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around May 31, with an average total accumulation of 3.2 inches.
The rainless period of the year lasts for 1.6 months, from December 17 to February 4. The least rain falls around January 8, with an average total accumulation of 0.3 inches.
Average Monthly Rainfall
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. Praz-sur-Arly experiences extreme seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 7.0 months, from October 11 to May 12, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around January 1, with an average total liquid-equivalent accumulation of 2.8 inches.
The snowless period of the year lasts for 5.0 months, from May 12 to October 11. The least snow falls around July 26, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in Praz-sur-Arly varies significantly over the course of the year. In 2018, the shortest day is December 21, with 8 hours, 40 minutes of daylight; the longest day is June 21, with 15 hours, 44 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:42 AM on June 16, and the latest sunrise is 2 hours, 32 minutes later at 8:15 AM on January 1. The earliest sunset is at 4:48 PM on December 10, and the latest sunset is 4 hours, 39 minutes later at 9:27 PM on June 26.
Daylight saving time (DST) is observed in Praz-sur-Arly 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
The perceived humidity level in Praz-sur-Arly, 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
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
Average Wind Speed
The predominant average hourly wind direction in Praz-sur-Arly varies throughout the year.
The wind is most often from the north for 2.1 weeks, from April 11 to April 26, with a peak percentage of 30% on April 20. The wind is most often from the west for 4.6 months, from April 26 to September 15, with a peak percentage of 42% on July 5. The wind is most often from the south for 6.9 months, from September 15 to April 11, with a peak percentage of 41% on January 1.
Best Time of Year to Visit
To characterize how pleasant the weather is in Praz-sur-Arly 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 Praz-sur-Arly for general outdoor tourist activities is from early July to mid August, with a peak score in the last week of July.
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 Praz-sur-Arly for hot-weather activities is from mid July to early August, with a peak score in the last week of July.
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.
The growing season in Praz-sur-Arly typically lasts for 4.2 months (129 days), from around May 19 to around September 25, rarely starting before April 28 or after June 8, and rarely ending before September 3 or after October 14.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Praz-sur-Arly should appear around May 24, only rarely appearing before May 12 or after June 9.
Growing Degree Days
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 3.2 months, from May 10 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 3.4 months, from October 29 to February 10, with an average daily incident shortwave energy per square meter below 2.6 kWh. The darkest day of the year is December 23, with an average of 1.5 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Praz-sur-Arly are 45.837 deg latitude, 6.573 deg longitude, and 4,685 ft elevation.
The topography within 2 miles of Praz-sur-Arly contains large variations in elevation, with a maximum elevation change of 3,015 feet and an average elevation above sea level of 4,306 feet. Within 10 miles contains large variations in elevation (8,973 feet). Within 50 miles also contains extreme variations in elevation (15,036 feet).
The area within 2 miles of Praz-sur-Arly is covered by trees (47%) and grassland (43%), within 10 miles by trees (41%) and grassland (33%), and within 50 miles by trees (36%) and grassland (22%).
This report illustrates the typical weather in Praz-sur-Arly, 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 Praz-sur-Arly.
For each station, the records are corrected for the elevation difference between that station and Praz-sur-Arly 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 Praz-sur-Arly is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Praz-sur-Arly and a given station.
Time zones for aiports and weather stations are provided by AskGeo.com .