December weather forecastBasin, WY
December
Weather in December
Wrapping up the year in Basin, Wyoming, December welcomes full-fledged winter conditions. The temperatures maintain their steady decline, resulting in a cold and snowy environment. Further reduction of daylight hours accentuates the winter feel while outdoor activities are left to the mercy of limited light. The month’s weather becomes significantly cold, with high temperatures averaging to a chilling 28.8°F (-1.8°C) from November's 41°F (5°C).Temperature
Basin's coldest temperatures are experienced in December, with average high temperatures of 28.8°F (-1.8°C) and lows of 14.2°F (-9.9°C).Humidity
In December, the average relative humidity is 73%.Rainfall
December is the month with the least rainfall in Basin. Rain falls for 6.5 days and accumulates 0.2" (5mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In December, it is snowing for 7.5 days. Throughout December, 1.3" (33mm) of snow is accumulated. Throughout the year, in Basin, there are 41.4 snowfall days, and 9.41" (239mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 8h and 54min of daylight.On the first day of December in Basin, sunrise is at 7:28 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:48 am and sunset at 4:42 pm MST.
Sunshine
In Basin, the average sunshine in December is 7h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Basin, Wyoming. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: A maximum high UV index of 2 in December translates into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Experience reduced UV exposure by about half when donning a wide-brim hat. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Basin, WY
- Average high temperature in December: 28.8°F
The warmest month (with the highest average high temperature) is July (85.1°F).
The month with the lowest average high temperature is December (28.8°F).
- Average low temperature in December: 14.2°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (13.8°F).
Average pressure in December
Basin, WY
- Average pressure in December: 30.15"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in December
Basin, WY
- Average wind speed in December: 6.5mph
The windiest month (with the highest average wind speed) is April (8.3mph).
The calmest months (with the lowest average wind speed) are January and August (6mph).
Average humidity in December
Basin, WY
- Average humidity in December: 73%
The month with the highest relative humidity is January (78%).
The months with the lowest relative humidity are July and August (33%).
Average rainfall in December
Basin, WY
- Average rainfall in December: 0.2"
The wettest month (with the highest rainfall) is May (0.87").
The driest month (with the least rainfall) is December (0.2").
Average rainfall days in December
Basin, WY
- Average rainfall days in December: 6.5 days
The month with the highest number of rainy days is May (12.6 days).
The month with the least rainy days is December (6.5 days).
Average snowfall in December
Basin, WY
- Average snowfall in December: 1.3"
The month with the highest snowfall is February (2.52").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Basin, WY
- Average snowfall days in December: 7.5 days
The month with the highest number of snowfall days is February (9.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Basin, 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: 7h and 0min
The months with the most sunshine are June, July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 6h and 42min).
Average sunshine days in December
Basin, WY
- Average sunshine days in December: 20.9 days
The month with the most sunshine days is December (20.9 days).
The months with the least sunshine days are April and June (12.5 days).
Average UV index in December
Basin, WY
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Basin, WY
- Average cloud cover in December: 26
The month with the most cloud cover is February (Cloud cover 28).
The months with the least cloud cover are July and August (Cloud cover 12).
Average visibility in December
Basin, 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).
