Average Weather in December in Sunnyside-Tahoe City California, United States
Daily high temperatures decrease by 4°F, from 42°F to 38°F, rarely falling below 28°F or exceeding 52°F. The lowest daily average high temperature is 38°F on December 23.
Daily low temperatures decrease by 4°F, from 22°F to 18°F, rarely falling below 5°F or exceeding 33°F. The lowest daily average low temperature is 18°F on December 31.
For reference, on August 3, the hottest day of the year, temperatures in Sunnyside-Tahoe City typically range from 44°F to 79°F, while on December 31, the coldest day of the year, they range from 18°F to 38°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
Seyne-les-Alpes, France (5,783 miles away); Ростуша, Macedonia (6,343 miles); and Anamas, Turkey (6,819 miles) are the far-away foreign places with temperatures most similar to Sunnyside-Tahoe City (view comparison).
The month of December in Sunnyside-Tahoe City experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 52% throughout the month.
The clearest day of the month is December 8, with clear, mostly clear, or partly cloudy conditions 50% of the time.
For reference, on March 2, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 55%, while on July 29, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 89%.
Cloud Cover Categories in December
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Sunnyside-Tahoe City, the chance of a wet day over the course of December is essentially constant, remaining around 30% throughout.
For reference, the year's highest daily chance of a wet day is 34% on February 24, and its lowest chance is 2% on July 20.
Over the course of December in Sunnyside-Tahoe City, the chance of a day with only rain decreases from 10% to 6%, the chance of a day with mixed snow and rain remains an essentially constant 13% throughout, and the chance of a day with only snow increases from 6% to 11%.
Probability of Precipitation in December
The average sliding 31-day rainfall during December in Sunnyside-Tahoe City is gradually decreasing, starting the month at 2.6 inches, when it rarely exceeds 6.2 inches or falls below 0.3 inches, and ending the month at 2.2 inches, when it rarely exceeds 6.2 inches or falls below 0.1 inches.
The highest average 31-day accumulation is 2.6 inches on December 5.
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 Sunnyside-Tahoe City is increasing, starting the month at 1.4 inches, when it rarely exceeds 3.3 inches or falls below 0.2 inches, and ending the month at 2.1 inches, when it rarely exceeds 4.7 inches or falls below 0.2 inches.
Average Monthly Liquid-Equivalent Snowfall in December
Over the course of December in Sunnyside-Tahoe City, the length of the day is essentially constant. The shortest day of the month is December 21, with 9 hours, 25 minutes of daylight and the longest day is December 1, with 9 hours, 37 minutes of daylight.
Hours of Daylight and Twilight in December
The earliest sunrise of the month in Sunnyside-Tahoe City is 7:01 AM on December 1 and the latest sunrise is 19 minutes later at 7:19 AM on December 31.
The earliest sunset is 4:37 PM on December 7 and the latest sunset is 10 minutes later at 4:47 PM on December 31.
Daylight saving time is observed in Sunnyside-Tahoe City 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 14 hours, 56 minutes later, at 8:30 PM, while on December 21, the shortest day of the year, it rises at 7:16 AM and sets 9 hours, 25 minutes later, at 4:41 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in December
The chance that a given day will be muggy in Sunnyside-Tahoe City is essentially constant during December, remaining around 0% throughout.
Humidity Comfort Levels in December
The average hourly wind speed in Sunnyside-Tahoe City is essentially constant during December, remaining within 0.1 miles per hour of 6.4 miles per hour throughout.
For reference, on March 18, the windiest day of the year, the daily average wind speed is 6.7 miles per hour, while on August 6, the calmest day of the year, the daily average wind speed is 4.9 miles per hour.
The highest daily average wind speed during December is 6.5 miles per hour on December 7.
Average Wind Speed in December
Wind Direction in December
The growing season in Sunnyside-Tahoe City typically lasts for 2.6 months (81 days), from around June 21 to around September 9, rarely starting before May 27 or after July 27, and rarely ending before August 11 or after October 4.
The month of December in Sunnyside-Tahoe City 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 Sunnyside-Tahoe City are essentially constant during December, remaining around 1,523°F throughout.
Growing Degree Days in December
The average daily incident shortwave solar energy in Sunnyside-Tahoe City is essentially constant during December, remaining within 0.1 kWh of 2.4 kWh throughout.
The lowest average daily incident shortwave solar energy during December is 2.3 kWh on December 23.
Average Daily Incident Shortwave Solar Energy in December
For the purposes of this report, the geographical coordinates of Sunnyside-Tahoe City are 39.150 deg latitude, -120.161 deg longitude, and 6,486 ft elevation.
The topography within 2 miles of Sunnyside-Tahoe City contains very significant variations in elevation, with a maximum elevation change of 1,089 feet and an average elevation above sea level of 6,547 feet. Within 10 miles contains very significant variations in elevation (3,881 feet). Within 50 miles also contains extreme variations in elevation (10,315 feet).
The area within 2 miles of Sunnyside-Tahoe City is covered by trees (75%) and water (23%), within 10 miles by trees (54%) and water (33%), and within 50 miles by shrubs (46%) and trees (46%).
This report illustrates the typical weather in Sunnyside-Tahoe City 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 Sunnyside-Tahoe City.
For each station, the records are corrected for the elevation difference between that station and Sunnyside-Tahoe City 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 Sunnyside-Tahoe City is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Sunnyside-Tahoe City and a given station.
The stations contributing to this reconstruction are: Truckee Tahoe Airport (43%, 19 kilometers, north); Lake Tahoe Airport (31%, 32 kilometers, southeast); Carson Airport (11%, 37 kilometers, east); Blue Canyon-Nyack Airport (12%, 49 kilometers, west); and Placerville Airport (3.5%, 70 kilometers, southwest).
Time zones for aiports and weather stations are provided by AskGeo.com .