December weather forecastSheridan, WY
December
Weather in December
December in Sheridan, Wyoming, immerses one into its snowy winter wonderland. The ambiance of the town is that of a storybook winter scene, bejeweled with holiday decorations. The sublime charm of wintry landscapes and snowy peaks becomes the month's highlight. Despite December being one of the coldest months and with temperatures slipping down to an average of 15.3°F (-9.3°C), it does not deter the spirit of the holiday season. This festive month is perfect for winter joys like ice-skating and other snow activities, promising a merry end to the year.Temperature
December implies a gentle temperature shift, with average high-temperatures reducing from November's icy 39.7°F (4.3°C) to a subzero cold 29.3°F (-1.5°C). Sheridan records an average low of 15.3°F (-9.3°C) throughout the nights in December.Humidity
The average relative humidity in December is 73%.Rainfall
December is the month with the least rainfall. Rain falls for 7.8 days and accumulates 0.75" (19mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. In Sheridan, during December, snow falls for 13.6 days and regularly aggregates up to 4.41" (112mm) of snow. In Sheridan, during the entire year, snow falls for 78.9 days and aggregates up to 46.3" (1176mm) of snow.Daylight
With an average of 8h and 54min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:25 am and sunset at 4:28 pm. On the last day of the month, sunrise is at 7:45 am and sunset at 4:37 pm MST.
Sunshine
The average sunshine in December is 6.5h.UV index
The months with the lowest UV index are January through April, October through December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.Note: In December, the maximum UV index of 2 suggests this advice:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. During bright days, sunglasses that offer UVA and UVB defense are recommended. 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
Sheridan, WY
- Average high temperature in December: 29.3°F
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is February (29.1°F).
- Average low temperature in December: 15.3°F
The month with the highest average low temperature is July (57°F).
The coldest month (with the lowest average low temperature) is February (14.4°F).
Average pressure in December
Sheridan, WY
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in December
Sheridan, WY
- Average wind speed in December: 6.6mph
The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).
Average humidity in December
Sheridan, WY
- Average humidity in December: 73%
The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is August (46%).
Average rainfall in December
Sheridan, WY
- Average rainfall in December: 0.75"
The wettest month (with the highest rainfall) is May (3.43").
The driest month (with the least rainfall) is December (0.75").
Average rainfall days in December
Sheridan, WY
- Average rainfall days in December: 7.8 days
The month with the highest number of rainy days is May (22.3 days).
The month with the least rainy days is November (7.5 days).
Average snowfall in December
Sheridan, WY
- Average snowfall in December: 4.41"
The month with the highest snowfall is April (8.7").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Sheridan, WY
- Average snowfall days in December: 13.6 days
The month with the highest number of snowfall days is February (15.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Sheridan, WY
- Average daylight in December: 8h and 54min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in December: 6h and 30min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 6min).
Average sunshine days in December
Sheridan, WY
- Average sunshine days in December: 14.2 days
The month with the most sunshine days is November (15.2 days).
The month with the least sunshine days is May (5.8 days).
Average UV index in December
Sheridan, WY
- Average UV index in December: 2
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in December
Sheridan, WY
- Average cloud cover in December: 33
The months with the most cloud cover are February and April (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 15).
Average visibility in December
Sheridan, 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).
