Average Weather in December in Tanay Switzerland
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 3°F, from 22°F to 19°F, rarely falling below 10°F or exceeding 30°F.
For reference, on August 4, the hottest day of the year, temperatures in Tanay typically range from 49°F to 68°F, while on January 28, the coldest day of the year, they range from 18°F to 30°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
Whistler, Canada (5,134 miles away); Haines, Alaska, United States (4,840 miles); and Valdez, Alaska, United States (4,867 miles) are the far-away foreign places with temperatures most similar to Tanay (view comparison).
The month of December in Tanay experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 57% throughout the month. The highest chance of overcast or mostly cloudy conditions is 58% on December 31.
The clearest day of the month is December 17, with clear, mostly clear, or partly cloudy conditions 44% of the time.
For reference, on May 8, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 61%, while on July 23, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 64%.
Cloud Cover Categories in December
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Tanay, the chance of a wet day over the course of December is essentially constant, remaining around 32% throughout.
For reference, the year's highest daily chance of a wet day is 42% on May 25, and its lowest chance is 27% on March 3.
Over the course of December in Tanay, the chance of a day with only rain decreases from 6% to 4%, the chance of a day with mixed snow and rain remains an essentially constant 11% throughout, and the chance of a day with only snow increases from 14% to 17%.
Probability of Precipitation in December
The average sliding 31-day rainfall during December in Tanay is gradually decreasing, starting the month at 1.5 inches, when it rarely exceeds 2.9 inches or falls below 0.2 inches, and ending the month at 1.1 inches, when it rarely exceeds 2.5 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 Tanay is increasing, starting the month at 1.7 inches, when it rarely exceeds 3.4 inches or falls below 0.3 inches, and ending the month at 2.2 inches, when it rarely exceeds 4.8 inches or falls below 0.5 inches.
The highest average 31-day liquid-equivalent accumulation is 2.3 inches on December 22.
Average Monthly Liquid-Equivalent Snowfall in December
Over the course of December in Tanay, the length of the day is essentially constant. The shortest day of the month is December 21, with 8 hours, 36 minutes of daylight and the longest day is December 1, with 8 hours, 53 minutes of daylight.
Hours of Daylight and Twilight in December
The earliest sunrise of the month in Tanay is 7:55 AM on December 1 and the latest sunrise is 21 minutes later at 8:15 AM on December 31.
The earliest sunset is 4:45 PM on December 10 and the latest sunset is 10 minutes later at 4:55 PM on December 31.
Daylight saving time is observed in Tanay 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 5:40 AM and sets 15 hours, 48 minutes later, at 9:28 PM, while on December 21, the shortest day of the year, it rises at 8:12 AM and sets 8 hours, 36 minutes later, at 4:48 PM.
Sunrise & Sunset with Twilight in December
The chance that a given day will be muggy in Tanay is essentially constant during December, remaining around 0% throughout.
Humidity Comfort Levels in December
The average hourly wind speed in Tanay is essentially constant during December, remaining within 0.2 miles per hour of 5.3 miles per hour throughout.
For reference, on January 29, the windiest day of the year, the daily average wind speed is 5.5 miles per hour, while on August 10, the calmest day of the year, the daily average wind speed is 4.6 miles per hour.
Average Wind Speed in December
Wind Direction in December
The growing season in Tanay typically lasts for 4.5 months (139 days), from around May 16 to around October 2, rarely starting before April 24 or after June 7, and rarely ending before September 10 or after October 22.
The month of December in Tanay 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 Tanay are essentially constant during December, remaining around 887°F throughout.
Growing Degree Days in December
The average daily incident shortwave solar energy in Tanay is essentially constant during December, remaining within 0.1 kWh of 1.5 kWh throughout.
The lowest average daily incident shortwave solar energy during December is 1.4 kWh on December 24.
Average Daily Incident Shortwave Solar Energy in December
For the purposes of this report, the geographical coordinates of Tanay are 46.345 deg latitude, 6.830 deg longitude, and 4,551 ft elevation.
The topography within 2 miles of Tanay contains extreme variations in elevation, with a maximum elevation change of 5,472 feet and an average elevation above sea level of 5,018 feet. Within 10 miles also contains extreme variations in elevation (6,670 feet). Within 50 miles also contains extreme variations in elevation (14,705 feet).
The area within 2 miles of Tanay is covered by trees (52%), grassland (21%), sparse vegetation (16%), and shrubs (10%), within 10 miles by trees (38%) and grassland (21%), and within 50 miles by trees (34%) and grassland (20%).
This report illustrates the typical weather in Tanay 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 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Tanay.
For each station, the records are corrected for the elevation difference between that station and Tanay 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 Tanay is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Tanay and a given station.
The stations contributing to this reconstruction are: Sion (30%, 40 kilometers, east); Aéroport Genève-Cointrin (25%, 57 kilometers, west); Neuchatel (23%, 73 kilometers, north); and Bern-Belp Airport (22%, 81 kilometers, northeast).
Time zones for aiports and weather stations are provided by AskGeo.com .