Average Weather in December in Plummer Idaho, United States
In Plummer, the month of December is characterized by gradually falling daily high temperatures, with daily highs decreasing by 4°F, from 36°F to 33°F over the course of the month, and rarely exceeding 46°F or dropping below 22°F. The lowest daily average high temperature is 33°F on December 29.
Daily low temperatures decrease by 3°F, from 28°F to 24°F, rarely falling below 11°F or exceeding 37°F. The lowest daily average low temperature is 24°F on December 30.
For reference, on August 3, the hottest day of the year, temperatures in Plummer typically range from 54°F to 84°F, while on December 30, the coldest day of the year, they range from 24°F to 33°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 Plummer experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 73% throughout the month.
The clearest day of the month is December 14, with clear, mostly clear, or partly cloudy conditions 28% of the time.
For reference, on January 10, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 74%, while on August 1, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 79%.
Cloud Cover Categories in December
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Plummer, the chance of a wet day over the course of December is decreasing, starting the month at 40% and ending it at 35%.
For reference, the year's highest daily chance of a wet day is 40% on November 21, and its lowest chance is 8% on August 4.
Over the course of December in Plummer, the chance of a day with only rain decreases from 25% to 15%, the chance of a day with mixed snow and rain remains an essentially constant 9% throughout, and the chance of a day with only snow increases from 7% to 11%.
Probability of Precipitation in December
The average sliding 31-day rainfall during December in Plummer is decreasing, starting the month at 2.5 inches, when it rarely exceeds 4.2 inches or falls below 0.8 inches, and ending the month at 1.8 inches, when it rarely exceeds 3.3 inches or falls below 0.4 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 Plummer is gradually increasing, starting the month at 0.5 inches, when it rarely exceeds 1.2 inches or falls below 0.1 inches, and ending the month at 0.9 inches, when it rarely exceeds 1.9 inches or falls below 0.1 inches.
The highest average 31-day liquid-equivalent accumulation is 0.9 inches on December 31.
Average Monthly Liquid-Equivalent Snowfall in December
Over the course of December in Plummer, the length of the day is essentially constant. The shortest day of the month is December 21, with 8 hours, 28 minutes of daylight and the longest day is December 1, with 8 hours, 45 minutes of daylight.
Hours of Daylight and Twilight in December
The earliest sunrise of the month in Plummer is 7:14 AM on December 1 and the latest sunrise is 21 minutes later at 7:34 AM on December 31.
The earliest sunset is 3:56 PM on December 10 and the latest sunset is 10 minutes later at 4:07 PM on December 31.
Daylight saving time is observed in Plummer during 2017, 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 4:51 AM and sets 15 hours, 57 minutes later, at 8:47 PM, while on December 21, the shortest day of the year, it rises at 7:31 AM and sets 8 hours, 28 minutes later, at 3:59 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in December
The chance that a given day will be muggy in Plummer is essentially constant during December, remaining around 0% throughout.
For reference, on July 27, 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 Plummer is essentially constant during December, remaining within 0.1 miles per hour of 5.7 miles per hour throughout.
For reference, on March 27, the windiest day of the year, the daily average wind speed is 6.1 miles per hour, while on July 30, the calmest day of the year, the daily average wind speed is 5.2 miles per hour.
The lowest daily average wind speed during December is 5.6 miles per hour on December 20.
Average Wind Speed in December
Wind Direction in December
The average daily incident shortwave solar energy in Plummer is essentially constant during December, remaining around 1.1 kWh throughout.
The lowest average daily incident shortwave solar energy during December is 1.0 kWh on December 26.
Average Daily Incident Shortwave Solar Energy in December
For the purposes of this report, the geographical coordinates of Plummer are 47.335 deg latitude, -116.889 deg longitude, and 2,861 ft elevation.
The topography within 2 miles of Plummer contains very significant variations in elevation, with a maximum elevation change of 1,503 feet and an average elevation above sea level of 2,896 feet. Within 10 miles contains very significant variations in elevation (2,283 feet). Within 50 miles contains large variations in elevation (5,682 feet).
The area within 2 miles of Plummer is covered by shrubs (48%), cropland (29%), and trees (14%), within 10 miles by cropland (39%) and shrubs (29%), and within 50 miles by trees (34%) and cropland (28%).
This report illustrates the typical weather in Plummer 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 Plummer.
For each station, the records are corrected for the elevation difference between that station and Plummer 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 Plummer is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Plummer and a given station.
The stations contributing to this reconstruction are: Coeur D'Alene Air Terminal (37%, 48 kilometers, north); Felts Field (31%, 51 kilometers, northwest); Pullman–Moscow Regional Airport (24%, 68 kilometers, south); and Mullan Pass, Mullan Pass Vor (9%, 95 kilometers, east).
Time zones for aiports and weather stations are provided by AskGeo.com .