Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
December, with its average high-temperature of 27.3°F (-2.6°C) and an average low-temperature of 11.8°F (-11.2°C), holds the record as the coldest month.Humidity
The average relative humidity in December is 74%.Rainfall
In Grass Creek, during December, the rain falls for 2.2 days and regularly aggregates up to 0.24" (6mm) of precipitation. In Grass Creek, Wyoming, during the entire year, the rain falls for 93.8 days and collects up to 12.05" (306mm) of precipitation.Snowfall
Months with snowfall are January through June, September through December. In Grass Creek, Wyoming, in December, during 6.5 snowfall days, 1.73" (44mm) of snow is typically accumulated. In Grass Creek, during the entire year, snow falls for 55.8 days and aggregates up to 30.31" (770mm) of snow.Daylight
With an average of 9h and 0min of daylight, December has the shortest days of the year.On the first day of December in Grass Creek, sunrise is at 7:29 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:48 am and sunset at 4:46 pm MST.
Sunshine
In December, the average sunshine in Grass Creek is 6.7h.UV index
The months with the lowest UV index in Grass Creek 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 low threat to health from exposure to the Sun's UV rays for average individuals.Note: The daily high UV index of 2 during December translates into the following recommendations:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
What is the coldest month in Grass Creek?
How cold is it in Grass Creek in December?
What is the average humidity in December in Grass Creek?
How many days does it rain in December in Grass Creek?
How many days does it snow in December in Grass Creek?
What is the month with the shortest days in Grass Creek?
How many hours of daylight does Grass Creek have in December?
When is the sunrise / sunset in December in Grass Creek?
How long on average sun shines in December in Grass Creek?
What is the month with the lowest UV index in Grass Creek?
How high is the UV index in December in Grass Creek?
Average temperature in December
Grass Creek, WY
- Average high temperature in December: 27.3°F
The warmest month (with the highest average high temperature) is July (76.1°F).
The month with the lowest average high temperature is December (27.3°F).
- Average low temperature in December: 11.8°F
The month with the highest average low temperature is July (53.8°F).
The coldest month (with the lowest average low temperature) is December (11.8°F).
Average pressure in December
Grass Creek, WY
- Average pressure in December: 30.18"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in December
Grass Creek, WY
- Average wind speed in December: 7.6mph
The windiest month (with the highest average wind speed) is January (7.9mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in December
Grass Creek, WY
- Average humidity in December: 74%
The month with the highest relative humidity is February (77%).
The month with the lowest relative humidity is July (43%).
Average rainfall in December
Grass Creek, WY
- Average rainfall in December: 0.24"
The wettest month (with the highest rainfall) is May (2.48").
The driest month (with the least rainfall) is January (0.2").
Average rainfall days in December
Grass Creek, WY
- Average rainfall days in December: 2.2 days
The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is January (1.6 days).
Average snowfall in December
Grass Creek, WY
- Average snowfall in December: 1.73"
The month with the highest snowfall is April (6.3").
The months with the least snowfall are July and August (0").
Average snowfall days in December
Grass Creek, WY
- Average snowfall days in December: 6.5 days
The month with the highest number of snowfall days is April (9.4 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Grass Creek, WY
- Average daylight in December: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in December: 6h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 6h and 24min).
Average sunshine days in December
Grass Creek, WY
- Average sunshine days in December: 24.4 days
The month with the most sunshine days is January (25 days).
The month with the least sunshine days is May (10.2 days).
Average UV index in December
Grass Creek, WY
- Average UV index in December: 2
The months with the highest UV index are June and July (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
Grass Creek, WY
- Average cloud cover in December: 29
The month with the most cloud cover is April (Cloud cover 35).
The months with the least cloud cover are July and September (Cloud cover 17).
Average visibility in December
Grass Creek, 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).
Grass Creek, Wyoming, USA
Weather forecast for your location
2. Allow the app to use your location
