December weather forecastThief River Falls, MN
December
Weather in December
December welcomes winter with the lowest temperature averaging around 18.5°F (-7.5°C) for the maximum and 7.5°F (-13.6°C) for the minimum. It observes the highest snowfall in the form of 5.24" (133mm) with the increased frequency of snow days. The relativity short daylight hours and least hours of sunshine contribute to the colder ambiance. A substantial increase in cloud cover is registered, causing a decrease in visibility. Despite the colder conditions, the overall weather fosters a festive atmosphere corresponding to the holiday season.Temperature
The onset of December brings a clear temperature shift, with the average high-temperature decreasing from an icy 34.3°F (1.3°C) in November to a freezing cold 18.5°F (-7.5°C). During the month of December, Thief River Falls anticipates a mean low-temperature of 7.5°F (-13.6°C).Humidity
The average relative humidity in December in Thief River Falls is 91%.Rainfall
In Thief River Falls, during December, the rain falls for 2.5 days and regularly aggregates up to 0.91" (23mm) of precipitation. In Thief River Falls, during the entire year, the rain falls for 104.3 days and collects up to 18.39" (467mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. The month with the most snowfall in Thief River Falls is December, when snow falls for 16.2 days and typically aggregates up to 5.24" (133mm) of snow.Daylight
With an average of 8h and 24min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:54 am and sunset at 4:33 pm. On the last day of December, sunrise is at 8:14 am and sunset at 4:41 pm CST.
Sunshine
In December, the average sunshine in Thief River Falls, Minnesota, is 2.8h.UV index
January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum daily UV index of 1 during December morphs into the following directions:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Thief River Falls, MN
- Average high temperature in December: 18.5°F
The warmest months (with the highest average high temperature) are July and August (78.4°F).
The month with the lowest average high temperature is January (13.8°F).
- Average low temperature in December: 7.5°F
The month with the highest average low temperature is July (58.8°F).
The coldest month (with the lowest average low temperature) is January (0°F).
Average pressure in December
Thief River Falls, MN
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in December
Thief River Falls, MN
- Average wind speed in December: 9.2mph
The windiest month (with the highest average wind speed) is October (10.1mph).
The calmest month (with the lowest average wind speed) is July (7.9mph).
Average humidity in December
Thief River Falls, MN
- Average humidity in December: 91%
The months with the highest relative humidity are January and February (93%).
The months with the lowest relative humidity are May and August (66%).
Average rainfall in December
Thief River Falls, MN
- Average rainfall in December: 0.91"
The wettest month (with the highest rainfall) is June (3.15").
The driest months (with the least rainfall) are January and February (0.63").
Average rainfall days in December
Thief River Falls, MN
- Average rainfall days in December: 2.5 days
The month with the highest number of rainy days is June (16.3 days).
The month with the least rainy days is January (1.9 days).
Average snowfall in December
Thief River Falls, MN
- Average snowfall in December: 5.24"
The month with the highest snowfall is December (5.24").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Thief River Falls, MN
- Average snowfall days in December: 16.2 days
The month with the highest number of snowfall days is December (16.2 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Thief River Falls, MN
- Average daylight in December: 8h and 24min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in December: 2h and 48min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).
Average sunshine days in December
Thief River Falls, MN
- Average sunshine days in December: 15.2 days
The month with the most sunshine days is August (18.5 days).
The month with the least sunshine days is June (11.3 days).
Average UV index in December
Thief River Falls, MN
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in December
Thief River Falls, MN
- Average cloud cover in December: 72
The months with the most cloud cover are January and February (Cloud cover 75).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in December
Thief River Falls, MN
- Average visibility in December: 4mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (4mi).
