Average Weather in December in East Valley Nevada, United States
Daily high temperatures decrease by 5°F, from 49°F to 44°F, rarely falling below 33°F or exceeding 59°F. The lowest daily average high temperature is 44°F on December 29.
Daily low temperatures decrease by 4°F, from 27°F to 23°F, rarely falling below 12°F or exceeding 39°F. The lowest daily average low temperature is 23°F on December 31.
For reference, on July 29, the hottest day of the year, temperatures in East Valley typically range from 51°F to 88°F, while on December 31, the coldest day of the year, they range from 23°F to 44°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
Valdepeñas de Jaén, Spain (5,771 miles away); Kayseri, Turkey (6,852 miles); and Farrokh Shahr, Iran (7,488 miles) are the far-away foreign places with temperatures most similar to East Valley (view comparison).
The month of December in East Valley experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 47% throughout the month.
The clearest day of the month is December 8, with clear, mostly clear, or partly cloudy conditions 55% of the time.
For reference, on March 2, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 51%, 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 East Valley, the chance of a wet day over the course of December is essentially constant, remaining around 24% throughout.
For reference, the year's highest daily chance of a wet day is 29% on February 21, and its lowest chance is 3% on August 31.
Over the course of December in East Valley, the chance of a day with only rain decreases from 15% to 12%, the chance of a day with mixed snow and rain remains an essentially constant 7% throughout, and the chance of a day with only snow increases from 2% to 4%.
Probability of Precipitation in December
The average sliding 31-day rainfall during December in East Valley is essentially constant, remaining about 2.0 inches throughout, and rarely exceeding 5.0 inches or falling 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 East Valley is gradually increasing, starting the month at 0.2 inches, when it rarely exceeds 0.7 inches, and ending the month at 0.5 inches, when it rarely exceeds 1.4 inches.
Average Monthly Liquid-Equivalent Snowfall in December
Over the course of December in East Valley, the length of the day is essentially constant. The shortest day of the month is December 21, with 9 hours, 26 minutes of daylight and the longest day is December 1, with 9 hours, 38 minutes of daylight.
Hours of Daylight and Twilight in December
The earliest sunrise of the month in East Valley is 6:58 AM on December 1 and the latest sunrise is 19 minutes later at 7:17 AM on December 31.
The earliest sunset is 4:36 PM on December 6 and the latest sunset is 10 minutes later at 4:46 PM on December 31.
Daylight saving time is observed in East Valley 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 5:33 AM and sets 14 hours, 54 minutes later, at 8:27 PM, while on December 21, the shortest day of the year, it rises at 7:13 AM and sets 9 hours, 26 minutes later, at 4:40 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in December
The chance that a given day will be muggy in East Valley is essentially constant during December, remaining around 0% throughout.
Humidity Comfort Levels in December
The average hourly wind speed in East Valley is essentially constant during December, remaining within 0.2 miles per hour of 6.4 miles per hour throughout.
For reference, on April 5, the windiest day of the year, the daily average wind speed is 7.4 miles per hour, while on August 6, the calmest day of the year, the daily average wind speed is 5.2 miles per hour.
The highest daily average wind speed during December is 6.6 miles per hour on December 1.
Average Wind Speed in December
Wind Direction in December
The growing season in East Valley typically lasts for 4.4 months (132 days), from around May 24 to around October 3, rarely starting before April 22 or after June 22, and rarely ending before September 11 or after October 27.
The month of December in East Valley 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 East Valley are essentially constant during December, remaining within 4°F of 2,700°F throughout.
Growing Degree Days in December
The average daily incident shortwave solar energy in East Valley is essentially constant during December, remaining within 0.1 kWh of 2.5 kWh throughout.
The lowest average daily incident shortwave solar energy during December is 2.4 kWh on December 23.
Average Daily Incident Shortwave Solar Energy in December
For the purposes of this report, the geographical coordinates of East Valley are 38.943 deg latitude, -119.699 deg longitude, and 4,898 ft elevation.
The topography within 2 miles of East Valley contains significant variations in elevation, with a maximum elevation change of 492 feet and an average elevation above sea level of 4,922 feet. Within 10 miles contains significant variations in elevation (5,164 feet). Within 50 miles also contains extreme variations in elevation (9,649 feet).
The area within 2 miles of East Valley is covered by shrubs (78%) and cropland (22%), within 10 miles by shrubs (70%) and cropland (20%), and within 50 miles by shrubs (59%) and trees (32%).
This report illustrates the typical weather in East Valley 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 East Valley.
For each station, the records are corrected for the elevation difference between that station and East Valley 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 East Valley is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between East Valley and a given station.
The stations contributing to this reconstruction are: Lake Tahoe Airport (26%, 26 kilometers, west); Carson Airport (63%, 27 kilometers, north); and Bridgeport Sonora Junction (11%, 67 kilometers, south).
Time zones for aiports and weather stations are provided by AskGeo.com .