Average Weather in December in Warm Springs Oregon, United States
Daily high temperatures decrease by 3°F, from 45°F to 42°F, rarely falling below 32°F or exceeding 53°F. The lowest daily average high temperature is 42°F on December 29.
Daily low temperatures decrease by 3°F, from 32°F to 29°F, rarely falling below 17°F or exceeding 41°F.
For reference, on July 30, the hottest day of the year, temperatures in Warm Springs typically range from 56°F to 87°F, while on December 23, the coldest day of the year, they range from 28°F to 42°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 Warm Springs experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 61% throughout the month.
The clearest day of the month is December 8, with clear, mostly clear, or partly cloudy conditions 40% of the time.
For reference, on January 16, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 63%, while on July 28, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 85%.
Cloud Cover Categories in December
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Warm Springs, the chance of a wet day over the course of December is rapidly decreasing, starting the month at 44% and ending it at 36%.
For reference, the year's highest daily chance of a wet day is 44% on November 28, and its lowest chance is 5% on August 6.
Over the course of December in Warm Springs, the chance of a day with only rain decreases from 38% to 28%, the chance of a day with mixed snow and rain remains an essentially constant 5% throughout, and the chance of a day with only snow remains an essentially constant 3% throughout.
Probability of Precipitation in December
The average sliding 31-day rainfall during December in Warm Springs is decreasing, starting the month at 3.3 inches, when it rarely exceeds 6.3 inches or falls below 1.0 inches, and ending the month at 2.7 inches, when it rarely exceeds 4.9 inches or falls below 0.8 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 Warm Springs is essentially constant, remaining about 0.3 inches throughout, and rarely exceeding 1.1 inches or falling to 0.0 inches.
The highest average 31-day liquid-equivalent accumulation is 0.3 inches on December 28.
Average Monthly Liquid-Equivalent Snowfall in December
Over the course of December in Warm Springs, the length of the day is essentially constant. The shortest day of the month is December 21, with 8 hours, 48 minutes of daylight and the longest day is December 1, with 9 hours, 3 minutes of daylight.
Hours of Daylight and Twilight in December
The earliest sunrise of the month in Warm Springs is 7:22 AM on December 1 and the latest sunrise is 20 minutes later at 7:42 AM on December 31.
The earliest sunset is 4:24 PM on December 10 and the latest sunset is 10 minutes later at 4:34 PM on December 31.
Daylight saving time is observed in Warm 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 5:19 AM and sets 15 hours, 35 minutes later, at 8:54 PM, while on December 21, the shortest day of the year, it rises at 7:39 AM and sets 8 hours, 48 minutes later, at 4:27 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in December
The chance that a given day will be muggy in Warm Springs is essentially constant during December, remaining around 0% throughout.
For reference, on August 14, 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 Warm Springs is essentially constant during December, remaining within 0.2 miles per hour of 6.6 miles per hour throughout.
For reference, on December 1, the windiest day of the year, the daily average wind speed is 6.8 miles per hour, while on August 23, 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 6.8 miles per hour on December 1.
Average Wind Speed in December
Wind Direction in December
The growing season in Warm Springs typically lasts for 5.6 months (172 days), from around April 28 to around October 17, rarely starting before April 6 or after May 18, and rarely ending before September 28 or after November 4.
The month of December in Warm Springs 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 Warm Springs are essentially constant during December, remaining within 1°F of 2,584°F throughout.
Growing Degree Days in December
The average daily incident shortwave solar energy in Warm Springs 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 26.
Average Daily Incident Shortwave Solar Energy in December
For the purposes of this report, the geographical coordinates of Warm Springs are 44.763 deg latitude, -121.266 deg longitude, and 1,749 ft elevation.
The topography within 2 miles of Warm Springs contains very significant variations in elevation, with a maximum elevation change of 1,020 feet and an average elevation above sea level of 1,783 feet. Within 10 miles contains very significant variations in elevation (2,149 feet). Within 50 miles contains large variations in elevation (10,748 feet).
The area within 2 miles of Warm Springs is covered by shrubs (100%), within 10 miles by shrubs (85%) and cropland (13%), and within 50 miles by shrubs (61%) and trees (32%).
This report illustrates the typical weather in Warm 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 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Warm Springs.
For each station, the records are corrected for the elevation difference between that station and Warm 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 Warm Springs is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Warm Springs and a given station.
The stations contributing to this reconstruction are: Roberts Field-Redmond Municipal Airport (44%, 57 kilometers, south); The Dalles Municipal Airport (24%, 96 kilometers, north); Portland–Troutdale Airport (16%, 125 kilometers, northwest); and Aurora State Airport (16%, 130 kilometers, northwest).
Time zones for aiports and weather stations are provided by AskGeo.com .