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 27.1°F (-2.7°C) and an average low of 13.3°F (-10.4°C).Humidity
The average relative humidity in December is 80%.Rainfall
In December, the rain falls for 5.7 days. Throughout December, 0.43" (11mm) of precipitation is accumulated. Throughout the year, there are 74.8 rainfall days, and 5.71" (145mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. The months with the most snowfall are March and December, with an average 3.15" (80mm) of accumulated snow.Daylight
December has the shortest days of the year, with an average of 9h and 6min of daylight.On the first day of December, sunrise is at 7:21 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 7:40 am and sunset at 4:48 pm MST.
Sunshine
The average sunshine in December is 6.3h.UV index
January through April, October through December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In December, an average UV index of 2 transforms into the following instructions:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. Around midday, solar radiation is most harmful; hence, exposure should be limited. Boost your sun resistance with garments that are densely woven yet spacious. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month?
How cold is it in December?
What is the average humidity in December?
How many days does it rain in December in Jeffrey City?
When does it snow the most?
How much does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When are sunrise and sunset in December?
How long on average sun shines in December?
What are the months with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Jeffrey City, WY
- Average high temperature in December: 27.1°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is December (27.1°F).
- Average low temperature in December: 13.3°F
The month with the highest average low temperature is July (59.2°F).
The coldest month (with the lowest average low temperature) is January (12.9°F).
Average pressure in December
Jeffrey City, WY
- Average pressure in December: 30.18"Hg
The month with the highest atmospheric pressure is January (30.2"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in December
Jeffrey City, WY
- Average wind speed in December: 10.5mph
The windiest months (with the highest average wind speed) are April and November (10.9mph).
The calmest month (with the lowest average wind speed) is August (8.3mph).
Average humidity in December
Jeffrey City, WY
- Average humidity in December: 80%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is August (34%).
Average rainfall in December
Jeffrey City, WY
- Average rainfall in December: 0.43"
The wettest month (with the highest rainfall) is April (0.79").
The driest months (with the least rainfall) are July and August (0.24").
Average rainfall days in December
Jeffrey City, WY
- Average rainfall days in December: 5.7 days
The month with the highest number of rainy days is April (10.3 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in December
Jeffrey City, WY
- Average snowfall in December: 3.15"
The months with the highest snowfall are March and December (3.15").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Jeffrey City, WY
- Average snowfall days in December: 10.5 days
The month with the highest number of snowfall days is December (10.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Jeffrey City, WY
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 6h and 2min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is February (Average sunshine: 6h and 12min).
Average sunshine days in December
Jeffrey City, WY
- Average sunshine days in December: 19.8 days
The month with the most sunshine days is September (22.1 days).
The month with the least sunshine days is April (14.5 days).
Average UV index in December
Jeffrey City, 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
Jeffrey City, WY
- Average cloud cover in December: 36
The month with the most cloud cover is February (Cloud cover 37).
The months with the least cloud cover are August and September (Cloud cover 13).
Average visibility in December
Jeffrey City, 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).
Jeffrey City, Wyoming, USA
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