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
With an average high-temperature of 28.4°F (-2°C) and an average low-temperature of 13.1°F (-10.5°C), December is the coldest month.Humidity
In December, the average relative humidity is 74%.Rainfall
In Sweetwater Station, in December, it is raining for 6.8 days, with typically 0.51" (13mm) of accumulated precipitation. In Sweetwater Station, during the entire year, the rain falls for 92.3 days and collects up to 9.92" (252mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. In Sweetwater Station, during December, snow falls for 9.9 days and regularly aggregates up to 3.58" (91mm) of snow. Throughout the year, there are 56.6 snowfall days, and 39.65" (1007mm) of snow is accumulated.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:23 am and sunset at 4:40 pm. On the last day of December, sunrise is at 7:42 am and sunset at 4:49 pm MST.
Sunshine
In December, the average sunshine is 7h.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 reading of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index of 2 during December translates into the following directions:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months?
How cold is it in December?
What is the average humidity in December?
How many days does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
What time are sunrise and sunset in December?
How many hours of sunshine does Sweetwater Station have in December?
What is the month with the lowest UV index in Sweetwater Station?
How high is the UV index in December?
Average temperature in December
Sweetwater Station, WY
- Average high temperature in December: 28.4°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is December (28.4°F).
- Average low temperature in December: 13.1°F
The month with the highest average low temperature is July (56.8°F).
The coldest month (with the lowest average low temperature) is December (13.1°F).
Average pressure in December
Sweetwater Station, WY
- Average pressure in December: 30.21"Hg
The month with the highest atmospheric pressure is January (30.23"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in December
Sweetwater Station, WY
- Average wind speed in December: 7.2mph
The windiest month (with the highest average wind speed) is March (7.7mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in December
Sweetwater Station, WY
- Average humidity in December: 74%
The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is August (34%).
Average rainfall in December
Sweetwater Station, WY
- Average rainfall in December: 0.51"
The wettest month (with the highest rainfall) is April (1.81").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days in December
Sweetwater Station, WY
- Average rainfall days in December: 6.8 days
The month with the highest number of rainy days is May (12.8 days).
The month with the least rainy days is November (4.8 days).
Average snowfall in December
Sweetwater Station, WY
- Average snowfall in December: 3.58"
The month with the highest snowfall is April (8.15").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Sweetwater Station, WY
- Average snowfall days in December: 9.9 days
The month with the highest number of snowfall days is February (10.1 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Sweetwater Station, WY
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 7h and 0min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The months with the least sunshine are January and February (Average sunshine: 6h and 54min).
Average sunshine days in December
Sweetwater Station, WY
- Average sunshine days in December: 19.1 days
The month with the most sunshine days is November (21.7 days).
The month with the least sunshine days is April (12.3 days).
Average UV index in December
Sweetwater Station, 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
Sweetwater Station, WY
- Average cloud cover in December: 25
The months with the most cloud cover are February and April (Cloud cover 28).
The months with the least cloud cover are July and August (Cloud cover 12).
Average visibility in December
Sweetwater Station, 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).
Sweetwater Station, Wyoming, USA
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