December weather forecastBirney, MT
December
Weather in December
The first month of the winter, December, is still a freezing cold month in Birney, Montana, with temperature in the range of an average low of 16.7°F (-8.5°C) and an average high of 31.1°F (-0.5°C).Temperature
With its high average temperature of 31.1°F (-0.5°C) and a low of 16.7°F (-8.5°C), December is regarded as the coldest month.Humidity
The average relative humidity in December is 75%.Rainfall
December is the month with the least rainfall. Rain falls for 6.8 days and accumulates 0.67" (17mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. In Birney, during December, snow falls for 11.2 days and regularly aggregates up to 3.62" (92mm) of snow. In Birney, during the entire year, snow falls for 65.3 days and aggregates up to 28.82" (732mm) of snow.Daylight
With an average of 8h and 48min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:25 am and sunset at 4:24 pm. On the last day of December, sunrise is at 7:45 am and sunset at 4:33 pm MST.
Sunshine
The average sunshine in December is 6.1h.UV index
The months with the lowest UV index in Birney are January through March, November and December, with an average maximum UV index of 2. 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: The maximum daily UV index, 2 in December, converts into the following recommendations:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Birney, MT
- Average high temperature in December: 31.1°F
The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is December (31.1°F).
- Average low temperature in December: 16.7°F
The month with the highest average low temperature is July (61.5°F).
The coldest months (with the lowest average low temperature) are January and February (16.2°F).
Average pressure in December
Birney, MT
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in December
Birney, MT
- Average wind speed in December: 6.8mph
The windiest month (with the highest average wind speed) is April (9.1mph).
The calmest months (with the lowest average wind speed) are July and December (6.8mph).
Average humidity in December
Birney, MT
- Average humidity in December: 75%
The months with the highest relative humidity are January and February (79%).
The month with the lowest relative humidity is August (40%).
Average rainfall in December
Birney, MT
- Average rainfall in December: 0.67"
The wettest month (with the highest rainfall) is May (2.64").
The driest month (with the least rainfall) is December (0.67").
Average rainfall days in December
Birney, MT
- Average rainfall days in December: 6.8 days
The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is January (6.3 days).
Average snowfall in December
Birney, MT
- Average snowfall in December: 3.62"
The month with the highest snowfall is February (5.2").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Birney, MT
- Average snowfall days in December: 11.2 days
The month with the highest number of snowfall days is February (14.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Birney, MT
- Average daylight in December: 8h and 48min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in December: 6h and 6min
The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 42min).
Average sunshine days in December
Birney, MT
- Average sunshine days in December: 16.5 days
The month with the most sunshine days is September (18.2 days).
The month with the least sunshine days is May (9.6 days).
Average UV index in December
Birney, MT
- Average UV index in December: 2
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Birney, MT
- Average cloud cover in December: 37
The month with the most cloud cover is February (Cloud cover 41).
The months with the least cloud cover are July and August (Cloud cover 14).
Average visibility in December
Birney, MT
- 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).
