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 brings the lowest temperatures, with an average high of 20.8°F (-6.2°C) and an average low of 2.3°F (-16.5°C).Humidity
The average relative humidity in December is 82%.Rainfall
The month with the least rainfall is December, when the rain falls for 4 days and typically collects 0.75" (19mm) of precipitation.Snowfall
January through June, August through December are months with snowfall. In Shell, in December, snow falls for 14.1 days, with typically accumulated 5.91" (150mm) of snow. In Shell, during the entire year, snow falls for 113.3 days and aggregates up to 89.02" (2261mm) of snow.Daylight
December has the shortest days of the year in Shell, with an average of 8h and 54min of daylight.On the first day of the month, sunrise is at 7:28 am and sunset at 4:32 pm. On the last day of December, sunrise is at 7:47 am and sunset at 4:41 pm MST.
Sunshine
In Shell, the average sunshine in December is 5.4h.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 low health risk from unsafe exposure to UV radiation for ordinary individuals.Note: In December, a daily UV index of 2 turns into the following recommendations:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. To guard against the harmful effects of the Sun, minimize exposure during midday. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months?
How cold is December?
What is the average humidity in December in Shell?
What is the driest month?
How many days does it rain in December in Shell?
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 in Shell?
How many hours of sunshine does Shell have in December?
What is the month with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Shell, WY
- Average high temperature in December: 20.8°F
The warmest month (with the highest average high temperature) is July (69.4°F).
The month with the lowest average high temperature is December (20.8°F).
- Average low temperature in December: 2.3°F
The month with the highest average low temperature is July (48.7°F).
The coldest month (with the lowest average low temperature) is December (2.3°F).
Average pressure in December
Shell, WY
- Average pressure in December: 30.14"Hg
The months with the highest atmospheric pressure are January and December (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in December
Shell, WY
- Average wind speed in December: 5.7mph
The windiest month (with the highest average wind speed) is June (6.3mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Shell, WY
- Average humidity in December: 82%
The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is August (51%).
Average rainfall in December
Shell, WY
- Average rainfall in December: 0.75"
The wettest month (with the highest rainfall) is May (3.62").
The driest month (with the least rainfall) is December (0.75").
Average rainfall days in December
Shell, WY
- Average rainfall days in December: 4 days
The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is November (2.3 days).
Average snowfall in December
Shell, WY
- Average snowfall in December: 5.91"
The month with the highest snowfall is May (19.33").
The month with the least snowfall is July (0").
Average snowfall days in December
Shell, WY
- Average snowfall days in December: 14.1 days
The month with the highest number of snowfall days is January (15.8 days).
The month with the least snowfall days is July (0 days).
Average daylight in December /
Average sunshine in December
Shell, WY
- Average daylight in December: 8h and 5min
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: 5h and 2min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in December
Shell, WY
- Average sunshine days in December: 16.8 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is June (8.6 days).
Average UV index in December
Shell, WY
- Average UV index in December: 2
The month with the highest UV index is 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
Shell, WY
- Average cloud cover in December: 44
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 16).
Average visibility in December
Shell, WY
- Average visibility in December: 4mi
The months with the highest visibility are May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (4mi).
Shell, Wyoming, USA
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