Average Weather in December in Bear Valley Springs California, United States
Daily high temperatures decrease by 3°F, from 51°F to 48°F, rarely falling below 38°F or exceeding 62°F. The lowest daily average high temperature is 48°F on December 26.
Daily low temperatures are around 32°F, rarely falling below 24°F or exceeding 39°F. The lowest daily average low temperature is 31°F on December 22.
For reference, on July 28, the hottest day of the year, temperatures in Bear Valley Springs typically range from 58°F to 85°F, while on December 22, the coldest day of the year, they range from 31°F to 48°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 Bear Valley Springs experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 43% to 47%. The highest chance of overcast or mostly cloudy conditions is 48% on December 28.
The clearest day of the month is December 1, with clear, mostly clear, or partly cloudy conditions 57% of the time.
For reference, on February 22, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 51%, while on August 23, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 90%.
Cloud Cover Categories in December
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Bear Valley Springs, the chance of a wet day over the course of December is increasing, starting the month at 11% and ending it at 17%.
For reference, the year's highest daily chance of a wet day is 19% on February 20, and its lowest chance is 1% on June 24.
Over the course of December in Bear Valley Springs, the chance of a day with only rain remains an essentially constant 10% throughout, the chance of a day with mixed snow and rain increases from 1% to 4%, and the chance of a day with only snow remains an essentially constant 1% throughout.
Probability of Precipitation in December
The average sliding 31-day rainfall during December in Bear Valley Springs is gradually increasing, starting the month at 0.9 inches, when it rarely exceeds 2.0 inches, and ending the month at 1.4 inches, when it rarely exceeds 3.4 inches or falls below 0.1 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 Bear Valley Springs is essentially constant, remaining about 0.1 inches throughout, and rarely exceeding 0.5 inches or falling below -0.0 inches.
Average Monthly Liquid-Equivalent Snowfall in December
Over the course of December in Bear Valley Springs, the length of the day is essentially constant. The shortest day of the month is December 21, with 9 hours, 47 minutes of daylight and the longest day is December 1, with 9 hours, 58 minutes of daylight.
Hours of Daylight and Twilight in December
The earliest sunrise of the month in Bear Valley Springs is 6:44 AM on December 1 and the latest sunrise is 18 minutes later at 7:02 AM on December 31.
The earliest sunset is 4:42 PM on December 5 and the latest sunset is 10 minutes later at 4:52 PM on December 31.
Daylight saving time is observed in Bear Valley Springs 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 14 hours, 32 minutes later, at 8:12 PM, while on December 21, the shortest day of the year, it rises at 6:59 AM and sets 9 hours, 47 minutes later, at 4:46 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in December
The chance that a given day will be muggy in Bear Valley Springs is essentially constant during December, remaining around 0% throughout.
For reference, on August 10, the muggiest day of the year, there are muggy conditions 0% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in December
The average hourly wind speed in Bear Valley Springs is essentially constant during December, remaining within 0.1 miles per hour of 7.2 miles per hour throughout.
For reference, on April 26, the windiest day of the year, the daily average wind speed is 8.3 miles per hour, while on August 23, the calmest day of the year, the daily average wind speed is 5.6 miles per hour.
The highest daily average wind speed during December is 7.3 miles per hour on December 23.
Average Wind Speed in December
Wind Direction in December
The growing season in Bear Valley Springs typically lasts for 6.2 months (191 days), from around April 29 to around November 6, rarely starting before April 4 or after May 25, and rarely ending before October 16 or after November 27.
The month of December in Bear Valley Springs is very likely fully outside of the growing season, with the chance that a given day is in the growing season reaching a low of -0% on December 22.
Time Spent in Various Temperature Bands and the Growing Season in December
The average accumulated growing degree days in Bear Valley Springs are essentially constant during December, remaining within 9°F of 2,851°F throughout.
Growing Degree Days in December
The average daily incident shortwave solar energy in Bear Valley Springs is essentially constant during December, remaining within 0.1 kWh of 2.9 kWh throughout.
The lowest average daily incident shortwave solar energy during December is 2.8 kWh on December 26.
Average Daily Incident Shortwave Solar Energy in December
For the purposes of this report, the geographical coordinates of Bear Valley Springs are 35.159 deg latitude, -118.628 deg longitude, and 4,498 ft elevation.
The topography within 2 miles of Bear Valley Springs contains very significant variations in elevation, with a maximum elevation change of 1,804 feet and an average elevation above sea level of 4,498 feet. Within 10 miles contains very significant variations in elevation (7,349 feet). Within 50 miles also contains extreme variations in elevation (8,553 feet).
The area within 2 miles of Bear Valley Springs is covered by shrubs (53%) and grassland (44%), within 10 miles by grassland (56%) and shrubs (33%), and within 50 miles by shrubs (52%) and grassland (25%).
This report illustrates the typical weather in Bear Valley Springs 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 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Bear Valley Springs.
For each station, the records are corrected for the elevation difference between that station and Bear Valley Springs 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 Bear Valley Springs is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Bear Valley Springs and a given station.
Time zones for aiports and weather stations are provided by AskGeo.com .