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
The coldest period is December, when temperatures fluctuate between an average high of 19.4°F (-7°C) and a low of 3.9°F (-15.6°C).Humidity
In Three River Junction, the average relative humidity in December is 93%.Rainfall
In Three River Junction, in December, during 3.5 rainfall days, 2.01" (51mm) of precipitation is typically accumulated. In Three River Junction, Wyoming, during the entire year, the rain falls for 94.6 days and collects up to 24.41" (620mm) of precipitation.Snowfall
Months with snowfall are January through December. In Three River Junction, in December, during 24.4 snowfall days, 15.71" (399mm) of snow is typically accumulated. In Three River Junction, during the entire year, snow falls for 176.8 days and aggregates up to 135.55" (3443mm) of snow.Daylight
The month with the shortest days is December, with an average of 8h and 54min of daylight.On the first day of December in Three River Junction, Wyoming, sunrise is at 7:39 am and sunset at 4:45 pm. On the last day of the month, sunrise is at 7:59 am and sunset at 4:54 pm MST.
Sunshine
The months with the least sunshine are February and December, with an average of 3.3h of sunshine.UV index
The months with the lowest UV index are January through March, October through December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for average individuals.Note: The daily maximum UV index of 1 in December interprets into the following advice:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Experience reduced UV exposure by about half when donning a wide-brim hat. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest?
How cold is it in Three River Junction in December?
What is the average humidity in December?
How much does it rain in December?
How much does it snow in Three River Junction 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?
What is the month with the least sunshine?
How long on average sun shines in December?
When is the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Three River Junction, WY
- Average high temperature in December: 19.4°F
The warmest month (with the highest average high temperature) is July (72.1°F).
The month with the lowest average high temperature is December (19.4°F).
- Average low temperature in December: 3.9°F
The month with the highest average low temperature is July (43.7°F).
The coldest month (with the lowest average low temperature) is December (3.9°F).
Average pressure in December
Three River Junction, WY
- Average pressure in December: 30.22"Hg
The month with the highest atmospheric pressure is January (30.24"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Three River Junction, WY
- Average wind speed in December: 6.6mph
The windiest months (with the highest average wind speed) are February and June (7.4mph).
The calmest months (with the lowest average wind speed) are May and August (6.3mph).
Average humidity in December
Three River Junction, WY
- Average humidity in December: 93%
The month with the highest relative humidity is February (94%).
The months with the lowest relative humidity are July and August (50%).
Average rainfall in December
Three River Junction, WY
- Average rainfall in December: 2.01"
The wettest month (with the highest rainfall) is May (3.03").
The driest month (with the least rainfall) is July (0.94").
Average rainfall days in December
Three River Junction, WY
- Average rainfall days in December: 3.5 days
The month with the highest number of rainy days is May (15.5 days).
The month with the least rainy days is January (2.2 days).
Average snowfall in December
Three River Junction, WY
- Average snowfall in December: 15.71"
The month with the highest snowfall is April (19.69").
The months with the least snowfall are July and August (0.08").
Average snowfall days in December
Three River Junction, WY
- Average snowfall days in December: 24.4 days
The month with the highest number of snowfall days is March (25.3 days).
The month with the least snowfall days is July (0.3 days).
Average daylight in December /
Average sunshine in December
Three River Junction, 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: 3h and 2min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The months with the least sunshine are February and December (Average sunshine: 3h and 18min).
Average sunshine days in December
Three River Junction, WY
- Average sunshine days in December: 7.1 days
The month with the most sunshine days is September (16 days).
The month with the least sunshine days is April (4.5 days).
Average UV index in December
Three River Junction, WY
- Average UV index in December: 1
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 1).
Average cloud cover in December
Three River Junction, WY
- Average cloud cover in December: 72
The month with the most cloud cover is February (Cloud cover 74).
The month with the least cloud cover is July (Cloud cover 15).
Average visibility in December
Three River Junction, WY
- Average visibility in December: 3mi
The months with the highest visibility are June, July, August and September (6mi).
The months with the lowest visibility are January, February and December (3mi).
Three River Junction, Wyoming, USA
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