Average Weather in December in Grindelwald Switzerland
Daily high temperatures decrease by 4°F, from 29°F to 25°F, rarely falling below 17°F or exceeding 36°F.
Daily low temperatures decrease by 3°F, from 19°F to 15°F, rarely falling below 6°F or exceeding 27°F.
For reference, on August 4, the hottest day of the year, temperatures in Grindelwald typically range from 45°F to 62°F, while on January 12, the coldest day of the year, they range from 14°F to 25°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 Grindelwald experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 54% throughout the month.
The clearest day of the month is December 17, with clear, mostly clear, or partly cloudy conditions 47% of the time.
For reference, on May 8, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 62%, while on July 23, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 60%.
Cloud Cover Categories in December
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Grindelwald, the chance of a wet day over the course of December is gradually increasing, starting the month at 30% and ending it at 33%.
For reference, the year's highest daily chance of a wet day is 48% on May 26, and its lowest chance is 27% on March 5.
Over the course of December in Grindelwald, the chance of a day with only rain remains an essentially constant 1% throughout, the chance of a day with mixed snow and rain decreases from 6% to 3%, and the chance of a day with only snow increases from 22% to 29%.
Probability of Precipitation in December
The average sliding 31-day rainfall during December in Grindelwald is gradually decreasing, starting the month at 0.6 inches, when it rarely exceeds 1.4 inches, and ending the month at 0.2 inches, when it rarely exceeds 0.6 inches or falls below -0.0 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 Grindelwald is gradually increasing, starting the month at 2.1 inches, when it rarely exceeds 3.8 inches or falls below 0.6 inches, and ending the month at 2.4 inches, when it rarely exceeds 4.7 inches or falls below 0.7 inches.
The highest average 31-day liquid-equivalent accumulation is 2.5 inches on December 21.
Average Monthly Liquid-Equivalent Snowfall in December
Over the course of December in Grindelwald, the length of the day is essentially constant. The shortest day of the month is December 21, with 8 hours, 34 minutes of daylight and the longest day is December 1, with 8 hours, 51 minutes of daylight.
Hours of Daylight and Twilight in December
The earliest sunrise of the month in Grindelwald is 7:51 AM on December 1 and the latest sunrise is 21 minutes later at 8:12 AM on December 31.
The earliest sunset is 4:40 PM on December 11 and the latest sunset is 10 minutes later at 4:49 PM on December 31.
Daylight saving time is observed in Grindelwald 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 5:34 AM and sets 15 hours, 51 minutes later, at 9:24 PM, while on December 21, the shortest day of the year, it rises at 8:09 AM and sets 8 hours, 34 minutes later, at 4:42 PM.
Sunrise & Sunset with Twilight in December
The chance that a given day will be muggy in Grindelwald is essentially constant during December, remaining around 0% throughout.
Humidity Comfort Levels in December
The average hourly wind speed in Grindelwald is essentially constant during December, remaining within 0.1 miles per hour of 4.9 miles per hour throughout.
For reference, on January 26, the windiest day of the year, the daily average wind speed is 5.2 miles per hour, while on August 10, the calmest day of the year, the daily average wind speed is 3.9 miles per hour.
Average Wind Speed in December
Wind Direction in December
The growing season in Grindelwald typically lasts for 3.3 months (102 days), from around June 2 to around September 12, rarely starting before May 14 or after June 23, and rarely ending before August 22 or after October 5.
The month of December in Grindelwald 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 Grindelwald are essentially constant during December, remaining around 467°F throughout.
Growing Degree Days in December
The average daily incident shortwave solar energy in Grindelwald 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 21.
Average Daily Incident Shortwave Solar Energy in December
For the purposes of this report, the geographical coordinates of Grindelwald are 46.624 deg latitude, 8.036 deg longitude, and 5,387 ft elevation.
The topography within 2 miles of Grindelwald contains extreme variations in elevation, with a maximum elevation change of 6,171 feet and an average elevation above sea level of 4,467 feet. Within 10 miles also contains extreme variations in elevation (12,067 feet). Within 50 miles also contains extreme variations in elevation (14,419 feet).
The area within 2 miles of Grindelwald is covered by trees (43%), grassland (32%), artificial surfaces (12%), and bare soil (10%), within 10 miles by snow and glaciers (27%) and grassland (23%), and within 50 miles by trees (31%) and grassland (22%).
This report illustrates the typical weather in Grindelwald 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 Grindelwald.
For each station, the records are corrected for the elevation difference between that station and Grindelwald 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 Grindelwald is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Grindelwald and a given station.
The stations contributing to this reconstruction are: Interlaken Airport (29%, 14 kilometers, northeast); Bern-Belp Airport (23%, 52 kilometers, northwest); Sion Airport (21%, 71 kilometers, southwest); Pian Rosa (11%, 81 kilometers, south); and Locarno Airport (15%, 82 kilometers, southeast).
Time zones for aiports and weather stations are provided by AskGeo.com .