December weather forecastDuncan, OK
December
Weather in December
December is when the full force of winter sets in. The season of snowfalls returns to Duncan with an average snowfall of 0.51" (13mm). The shorter daylight hours and the colder temperatures hint at the longer nights and the winter chill. Comparatively, December experiences one of the lowest average maximum temperatures at 51.3°F (10.7°C) and minimums falling to a chilly 35.8°F (2.1°C). As a month symbolizing winter, December indeed provides weather befitting the season.Temperature
Duncan witnesses its lowest temperatures in January and December, reaching an average of 51.3°F (10.7°C).Humidity
The average relative humidity in December is 66%.Rainfall
In Duncan, in December, during 6 rainfall days, 1.14" (29mm) of precipitation is typically accumulated. In Duncan, during the entire year, the rain falls for 113.4 days and collects up to 24.61" (625mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In December, it is snowing for 1 days. Throughout December, 0.51" (13mm) of snow is accumulated. Throughout the year, there are 5.1 snowfall days, and 3.03" (77mm) of snow is accumulated.Daylight
With an average of 9h and 54min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:20 am and sunset at 5:21 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 5:31 pm CST.
Sunshine
December has the least sunshine of the year, with an average of 6h of sunshine.UV index
With an average maximum UV index of 2, December is the month with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum UV index, 2 during December, leads to the following recommendations:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Duncan, OK
- Average high temperature in December: 51.3°F
The warmest month (with the highest average high temperature) is August (95°F).
The months with the lowest average high temperature are January and December (51.3°F).
- Average low temperature in December: 35.8°F
The month with the highest average low temperature is July (73.9°F).
The coldest month (with the lowest average low temperature) is January (33.6°F).
Average pressure in December
Duncan, OK
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in December
Duncan, OK
- Average wind speed in December: 9.7mph
The windiest month (with the highest average wind speed) is April (11.6mph).
The calmest months (with the lowest average wind speed) are July, August and September (8.3mph).
Average humidity in December
Duncan, OK
- Average humidity in December: 66%
The month with the highest relative humidity is May (73%).
The month with the lowest relative humidity is August (55%).
Average rainfall in December
Duncan, OK
- Average rainfall in December: 1.14"
The wettest month (with the highest rainfall) is May (4.37").
The driest month (with the least rainfall) is February (1.02").
Average rainfall days in December
Duncan, OK
- Average rainfall days in December: 6 days
The month with the highest number of rainy days is May (13.5 days).
The month with the least rainy days is January (5 days).
Average snowfall in December
Duncan, OK
- Average snowfall in December: 0.51"
The month with the highest snowfall is February (1.3").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Duncan, OK
- Average snowfall days in December: 1 days
The month with the highest number of snowfall days is February (1.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Duncan, OK
- Average daylight in December: 9h and 54min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in December: 6h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).
Average sunshine days in December
Duncan, OK
- Average sunshine days in December: 23.2 days
The month with the most sunshine days is January (24.3 days).
The month with the least sunshine days is May (15.7 days).
Average UV index in December
Duncan, OK
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in December
Duncan, OK
- Average cloud cover in December: 33
The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is August (Cloud cover 20).
Average visibility in December
Duncan, OK
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
