This report describes the typical weather at the Shawnee Regional Airport (Shawnee, Oklahoma, United States) weather station over the course of an average December. It is based on the historical records from 2001 to 2012. Earlier records are either unavailable or unreliable.
Shawnee, Oklahoma has a warm humid temperate climate with hot summers and no dry season. The area within 25 mi of this station is covered by grasslands (98%).
The month of December is characterized by gradually falling daily high temperatures, with daily highs around 53°F throughout the month, exceeding 67°F or dropping below 37°F only one day in ten.
Over the course of December, the length of the day is essentially constant. The shortest day of the month is December 22 with 9:45 hours of daylight; the longest day is December 1 with 9:56 hours of daylight.
The earliest sunrise is at 7:19am on December 1; the latest sunset is at 5:25pm on December 31; the latest sunrise is at 7:37am on December 31; the earliest sunset is at 5:14pm on December 6.
Daylight saving time is observed in 2012 but it neither starts nor ends in December, so the entire month is in standard time.
The median cloud cover is 9% (clear) and does not vary substantially over the course of the month.
On December 16, a representative day, the sky is clear or mostly clear 61% of the time, partly cloudy 3% of the time, and mostly cloudy or overcast 28% of the time.
The average probability that some form of precipitation will be observed in a given day is 24%, with little variation over the course of the month.
Throughout December, the most common forms of precipitation are moderate rain, thunderstorms, light snow, and light rain.
Moderate rain is the most severe precipitation observed during 25% of those days with precipitation. It is most likely around December 1, when it is observed during 7% of all days.
Thunderstorms are the most severe precipitation observed during 23% of those days with precipitation. They are most likely around December 1, when it is observed during 7% of all days.
Light snow is the most severe precipitation observed during 18% of those days with precipitation. It is most likely around December 19, when it is observed during 5% of all days.
Light rain is the most severe precipitation observed during 14% of those days with precipitation. It is most likely around December 1, when it is observed during 5% of all days.
The likelihood of snow falling is highest around December 31, occurring in 8% of days.
Either snow rarely accumulates at this location in December or snow depth measurements are unavailable or unreliable.
The relative humidity typically ranges from 45% (comfortable) to 88% (very humid) over the course of a typical December, rarely dropping below 26% (dry) and reaching as high as 100% (very humid).
The air is driest around December 30, at which time the relative humidity drops below 56% (mildly humid) three days out of four; it is most humid around December 16, rising above 82% (humid) three days out of four.
Dew point is often a better measure of how comfortable a person will find the weather than relative humidity because it more directly relates to whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid.
Over the course of a typical December, the dew point typically varies from 23°F (dry) to 39°F (dry) and is rarely below 12°F (dry) or above 53°F (very comfortable).
Over the course of December typical wind speeds vary from 0 mph to 17 mph (calm to moderate breeze), rarely exceeding 24 mph (strong breeze).
The highest average wind speed of 10 mph (gentle breeze) occurs around December 31, at which time the average daily maximum wind speed is 17 mph (moderate breeze).
The lowest average wind speed of 9 mph (gentle breeze) occurs around December 10, at which time the average daily maximum wind speed is 16 mph (moderate breeze).