December weather forecastFoster, OK
December
Weather in December
December, the first month of the winter in Foster, is still a cool month, with an average temperature fluctuating between 34.9°F (1.6°C) and 50.7°F (10.4°C).Temperature
Foster in December experiences a subtle temperature decline, with average high-temperatures reducing from an enjoyable 60.8°F (16°C) in November to a cool 50.7°F (10.4°C). In Foster, the average nighttime temperature during December is a cold 34.9°F (1.6°C).Humidity
In Foster, the average relative humidity in December is 67%.Rainfall
In December, the rain falls for 6.3 days. Throughout December, 1.22" (31mm) of precipitation is accumulated. Throughout the year, there are 119.9 rainfall days, and 24.65" (626mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall. In Foster, in December, snow falls for 1 days, with typically accumulated 0.79" (20mm) of snow. Throughout the year, there are 5.2 snowfall days, and 3.11" (79mm) 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 the month, sunrise is at 7:19 am and sunset at 5:19 pm. On the last day of December, sunrise is at 7:36 am and sunset at 5:29 pm CST.
Sunshine
December has the least sunshine of the year, with an average of 6.1h of sunshine.UV index
The month with the lowest UV index is December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 2 during December leads to these advisories:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Foster, OK
- Average high temperature in December: 50.7°F
The warmest months (with the highest average high temperature) are July and August (93.9°F).
The month with the lowest average high temperature is January (50.2°F).
- Average low temperature in December: 34.9°F
The month with the highest average low temperature is July (73.2°F).
The coldest month (with the lowest average low temperature) is January (33.4°F).
Average pressure in December
Foster, 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
Foster, OK
- Average wind speed in December: 9.8mph
The windiest month (with the highest average wind speed) is April (11.6mph).
The calmest months (with the lowest average wind speed) are July and August (8.1mph).
Average humidity in December
Foster, OK
- Average humidity in December: 67%
The month with the highest relative humidity is May (75%).
The month with the lowest relative humidity is August (58%).
Average rainfall in December
Foster, OK
- Average rainfall in December: 1.22"
The wettest month (with the highest rainfall) is May (3.94").
The driest months (with the least rainfall) are February and November (1.06").
Average rainfall days in December
Foster, OK
- Average rainfall days in December: 6.3 days
The month with the highest number of rainy days is May (14.4 days).
The month with the least rainy days is January (5.2 days).
Average snowfall in December
Foster, OK
- Average snowfall in December: 0.79"
The month with the highest snowfall is February (1.46").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Foster, OK
- Average snowfall days in December: 1 days
The month with the highest number of snowfall days is February (2 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
Foster, 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 6min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 6min).
Average sunshine days in December
Foster, OK
- Average sunshine days in December: 23 days
The month with the most sunshine days is January (24 days).
The month with the least sunshine days is May (14.1 days).
Average UV index in December
Foster, 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
Foster, OK
- Average cloud cover in December: 31
The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is August (Cloud cover 18).
Average visibility in December
Foster, 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).
