December Weather in Oklahoma City Oklahoma, United States
Daily high temperatures decrease by 7°F, from 55°F to 49°F, rarely falling below 32°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 23, the hottest day of the year, temperatures in Oklahoma City typically range from 74°F to 94°F, while on January 4, the coldest day of the year, they range from 30°F to 49°F.
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.
Kahramanmaraş, Turkey (6,614 miles away); Shahre Jadide Andisheh, Iran (7,128 miles); and Changshu City, China (7,186 miles) are the far-away foreign places with temperatures most similar to Oklahoma City (view comparison).
The month of December in Oklahoma City experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 42% throughout the month.
The clearest day of the month is December 1, with clear, mostly clear, or partly cloudy conditions 60% of the time.
For reference, on February 16, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 46%, while on October 5, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 74%.
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Oklahoma City, the chance of a wet day over the course of December is gradually decreasing, starting the month at 14% and ending it at 11%.
For reference, the year's highest daily chance of a wet day is 40% on June 4, and its lowest chance is 10% on January 19.
Over the course of December in Oklahoma City, the chance of a day with only rain decreases from 12% to 7%, the chance of a day with mixed snow and rain remains an essentially constant 2% throughout, and the chance of a day with only snow remains an essentially constant 1% throughout.
To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day rainfall during December in Oklahoma City is decreasing, starting the month at 1.6 inches, when it rarely exceeds 3.6 inches or falls below 0.1 inches, and ending the month at 1.0 inches, when it rarely exceeds 2.5 inches.
As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day snowfall during December in Oklahoma City is gradually increasing, starting the month at 1.3 inches, when it rarely exceeds 5.1 inches or falls below -0.0 inches, and ending the month at 1.9 inches, when it rarely exceeds 6.7 inches or falls below -0.0 inches.
Over the course of December in Oklahoma City, the length of the day is essentially constant. The shortest day of the month is December 21, with 9 hours, 46 minutes of daylight and the longest day is December 1, with 9 hours, 57 minutes of daylight.
The earliest sunrise of the month in Oklahoma City is 7:20 AM on December 1 and the latest sunrise is 18 minutes later at 7:39 AM on December 31.
The earliest sunset is 5:16 PM on December 5 and the latest sunset is 10 minutes later at 5:27 PM on December 31.
Daylight saving time is observed in Oklahoma City during 2023, 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 6:15 AM and sets 14 hours, 33 minutes later, at 8:48 PM, while on December 22, the shortest day of the year, it rises at 7:35 AM and sets 9 hours, 46 minutes later, at 5:21 PM.
The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.
The figure below presents a compact representation of key lunar data for December 2023. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.
We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.
The chance that a given day will be muggy in Oklahoma City is essentially constant during December, remaining around 0% throughout.
The lowest chance of a muggy day during December is 0% on December 22.
For reference, on July 5, the muggiest day of the year, there are muggy conditions 70% of the time, while on December 12, the least muggy day of the year, there are muggy conditions 0% of the time.
This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.
The average hourly wind speed in Oklahoma City is essentially constant during December, remaining within 0.2 miles per hour of 11.0 miles per hour throughout.
For reference, on April 4, the windiest day of the year, the daily average wind speed is 13.2 miles per hour, while on August 12, the calmest day of the year, the daily average wind speed is 9.0 miles per hour.
The lowest daily average wind speed during December is 10.8 miles per hour on December 19.
The wind direction in Oklahoma City during December is predominantly out of the south from December 1 to December 22 and the north from December 22 to December 31.
Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).
The growing season in Oklahoma City typically lasts for 7.6 months (234 days), from around March 23 to around November 12, rarely starting before March 3 or after April 14, and rarely ending before October 23 or after November 30.
The month of December in Oklahoma City is very likely fully outside of the growing season, with the chance that a given day is in the growing season gradually decreasing from 9% to -0% over the course of the month.
Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.
The average accumulated growing degree days in Oklahoma City are gradually increasing during December, increasing by 47°F, from 5,162°F to 5,209°F, over the course of the month.
This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.
The average daily incident shortwave solar energy in Oklahoma City is essentially constant during December, remaining within 0.1 kWh of 2.7 kWh throughout.
The lowest average daily incident shortwave solar energy during December is 2.6 kWh on December 22.
For the purposes of this report, the geographical coordinates of Oklahoma City are 35.468 deg latitude, -97.516 deg longitude, and 1,194 ft elevation.
The topography within 2 miles of Oklahoma City contains only modest variations in elevation, with a maximum elevation change of 108 feet and an average elevation above sea level of 1,202 feet. Within 10 miles also contains only modest variations in elevation (364 feet). Within 50 miles contains only modest variations in elevation (948 feet).
The area within 2 miles of Oklahoma City is covered by artificial surfaces (91%), within 10 miles by artificial surfaces (62%) and grassland (21%), and within 50 miles by grassland (55%) and cropland (28%).
This report illustrates the typical weather in Oklahoma City, 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 Oklahoma City.
For each station, the records are corrected for the elevation difference between that station and Oklahoma City 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 Oklahoma City is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Oklahoma City and a given station.
The stations contributing to this reconstruction are:
To get a sense of how much these sources agree with each other, you can view a comparison of Oklahoma City and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data.
All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus.
All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.
Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.
Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.
Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .
Time zones for airports and weather stations are provided by AskGeo.com .
Maps are © OpenStreetMap contributors.
The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.
We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.
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