December weather forecastCentennial, WY
December
Weather in December
December, the first month of the winter in Centennial, is also a subzero cold month, with an average temperature fluctuating between 28.2°F (-2.1°C) and 14.2°F (-9.9°C).Temperature
December tends to be the coldest month, with temperatures averaging a daily high of 28.2°F (-2.1°C) and a low of 14.2°F (-9.9°C).Humidity
In December, the average relative humidity in Centennial is 75%.Rainfall
In December, the rain falls for 6 days. Throughout December, 0.75" (19mm) of precipitation is accumulated. Throughout the year, in Centennial, there are 110.5 rainfall days, and 14.57" (370mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through June, September through December. In December, in Centennial, it is snowing for 11.8 days. Throughout December, 4.96" (126mm) of snow is accumulated. In Centennial, Wyoming, during the entire year, snow falls for 89 days and aggregates up to 49.8" (1265mm) of snow.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:11 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 4:45 pm MST.
Sunshine
December has the least sunshine of the year in Centennial, with an average of 6.4h of sunshine.UV index
January through April, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Centennial. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In December, a regular UV index of 2 translates into these guidelines:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The solar radiation around mid-day is intense; avoid the Sun and stay safe. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Centennial, WY
- Average high temperature in December: 28.2°F
The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is December (28.2°F).
- Average low temperature in December: 14.2°F
The month with the highest average low temperature is July (53.6°F).
The coldest month (with the lowest average low temperature) is December (14.2°F).
Average pressure in December
Centennial, WY
- Average pressure in December: 30.15"Hg
The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in December
Centennial, WY
- Average wind speed in December: 13.6mph
The windiest month (with the highest average wind speed) is January (14.1mph).
The calmest month (with the lowest average wind speed) is July (8.9mph).
Average humidity in December
Centennial, WY
- Average humidity in December: 75%
The month with the highest relative humidity is February (76%).
The month with the lowest relative humidity is August (43%).
Average rainfall in December
Centennial, WY
- Average rainfall in December: 0.75"
The wettest month (with the highest rainfall) is May (2.52").
The driest month (with the least rainfall) is January (0.51").
Average rainfall days in December
Centennial, WY
- Average rainfall days in December: 6 days
The month with the highest number of rainy days is July (14.9 days).
The month with the least rainy days is November (4 days).
Average snowfall in December
Centennial, WY
- Average snowfall in December: 4.96"
The month with the highest snowfall is April (9.84").
The months with the least snowfall are July and August (0").
Average snowfall days in December
Centennial, WY
- Average snowfall days in December: 11.8 days
The month with the highest number of snowfall days is April (13.7 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Centennial, WY
- Average daylight in December: 9h and 18min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 6h and 24min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).
Average sunshine days in December
Centennial, WY
- Average sunshine days in December: 17.6 days
The month with the most sunshine days is January (19.4 days).
The month with the least sunshine days is May (9 days).
Average UV index in December
Centennial, WY
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in December
Centennial, WY
- Average cloud cover in December: 30
The month with the most cloud cover is February (Cloud cover 34).
The month with the least cloud cover is September (Cloud cover 16).
Average visibility in December
Centennial, WY
- 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).
