Average Weather in December in Vian Oklahoma, United States
Daily high temperatures decrease by 7°F, from 56°F to 49°F, rarely falling below 34°F or exceeding 69°F.
Daily low temperatures decrease by 6°F, from 37°F to 31°F, rarely falling below 17°F or exceeding 50°F.
For reference, on July 24, the hottest day of the year, temperatures in Vian typically range from 72°F to 93°F, while on January 7, the coldest day of the year, they range from 30°F to 49°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
’Aïn el Bell, Algeria (5,298 miles away); Kafr Takhārīm, Syria (6,596 miles); and Shahrisabz, Uzbekistan (7,164 miles) are the far-away foreign places with temperatures most similar to Vian (view comparison).
The month of December in Vian experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 46% throughout the month. The highest chance of overcast or mostly cloudy conditions is 48% on December 27.
The clearest day of the month is December 1, with clear, mostly clear, or partly cloudy conditions 56% of the time.
For reference, on February 16, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 49%, while on October 5, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 71%.
Cloud Cover Categories in December
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Vian, the chance of a wet day over the course of December is decreasing, starting the month at 22% and ending it at 17%.
For reference, the year's highest daily chance of a wet day is 43% on May 21, and its lowest chance is 15% on January 16.
Over the course of December in Vian, the chance of a day with only rain decreases from 20% to 14%, the chance of a day with mixed snow and rain remains an essentially constant 1% throughout, 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 Vian is decreasing, starting the month at 3.2 inches, when it rarely exceeds 6.5 inches or falls below 0.5 inches, and ending the month at 2.4 inches, when it rarely exceeds 5.6 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 Vian is essentially constant, remaining about 0.1 inches throughout, and rarely exceeding 0.5 inches or falling to 0.0 inches.
Average Monthly Liquid-Equivalent Snowfall in December
Over the course of December in Vian, the length of the day is essentially constant. The shortest day of the month is December 21, with 9 hours, 45 minutes of daylight and the longest day is December 1, with 9 hours, 56 minutes of daylight.
Hours of Daylight and Twilight in December
The earliest sunrise of the month in Vian is 7:10 AM on December 1 and the latest sunrise is 18 minutes later at 7:28 AM on December 31.
The earliest sunset is 5:06 PM on December 6 and the latest sunset is 10 minutes later at 5:17 PM on December 31.
Daylight saving time is observed in Vian 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 6:04 AM and sets 14 hours, 34 minutes later, at 8:38 PM, while on December 21, the shortest day of the year, it rises at 7:25 AM and sets 9 hours, 45 minutes later, at 5:10 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in December
The chance that a given day will be muggy in Vian is essentially constant during December, remaining around 0% throughout.
For reference, on July 6, the muggiest day of the year, there are muggy conditions 82% of the time, while on December 13, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in December
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Vian is essentially constant during December, remaining within 0.1 miles per hour of 7.8 miles per hour throughout.
For reference, on March 19, the windiest day of the year, the daily average wind speed is 9.1 miles per hour, while on August 3, the calmest day of the year, the daily average wind speed is 5.6 miles per hour.
Average Wind Speed in December
Wind Direction in December
The growing season in Vian typically lasts for 7.3 months (223 days), from around March 28 to around November 6, rarely starting before March 6 or after April 17, and rarely ending before October 18 or after November 27.
The month of December in Vian is very likely fully outside of the growing season, with the chance that a given day is in the growing season gradually decreasing from 6% to 0% over the course of the month.
Time Spent in Various Temperature Bands and the Growing Season in December
The average accumulated growing degree days in Vian are gradually increasing during December, increasing by 54°F, from 5,036°F to 5,090°F, over the course of the month.
Growing Degree Days in December
The average daily incident shortwave solar energy in Vian 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 Vian are 35.498 deg latitude, -94.970 deg longitude, and 564 ft elevation.
The topography within 2 miles of Vian contains only modest variations in elevation, with a maximum elevation change of 397 feet and an average elevation above sea level of 563 feet. Within 10 miles contains only modest variations in elevation (869 feet). Within 50 miles contains very significant variations in elevation (2,211 feet).
The area within 2 miles of Vian is covered by cropland (65%) and trees (31%), within 10 miles by trees (43%) and cropland (40%), and within 50 miles by cropland (46%) and trees (44%).
This report illustrates the typical weather in Vian 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 Vian.
For each station, the records are corrected for the elevation difference between that station and Vian 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 Vian is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Vian and a given station.
The stations contributing to this reconstruction are: Sallisaw Municipal Airport (51%, 17 kilometers, southeast); Stigler Regional Airport (25%, 27 kilometers, southwest); Davis Field Airport (14%, 40 kilometers, northwest); and Tahlequah Municipal Airport (10%, 48 kilometers, north).
Time zones for aiports and weather stations are provided by AskGeo.com .