December weather forecastBynum, MT
December
Weather in December
December, the first month of the winter in Bynum, is still a freezing cold month, with temperature in the range of an average high of 28.8°F (-1.8°C) and an average low of 16.2°F (-8.8°C).Temperature
With average high and low temperatures of 28.8°F (-1.8°C) and 16.2°F (-8.8°C) respectively, December is Bynum's coldest month.Humidity
In Bynum, the average relative humidity in December is 75%.Rainfall
The month with the least rainfall is December, when the rain falls for 3.5 days and typically collects 0.35" (9mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. In Bynum, in December, during 8.3 snowfall days, 2.4" (61mm) of snow is typically accumulated. In Bynum, during the entire year, snow falls for 50.3 days and aggregates up to 21.26" (540mm) of snow.Daylight
With an average of 8h and 30min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:58 am and sunset at 4:38 pm. On the last day of December, sunrise is at 8:18 am and sunset at 4:46 pm MST.
Sunshine
December has the least sunshine of the year, with an average of 5.8h of sunshine.UV index
January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The average daily UV index of 2 in December transforms into the following instructions:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Bynum, MT
- Average high temperature in December: 28.8°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is December (28.8°F).
- Average low temperature in December: 16.2°F
The month with the highest average low temperature is August (55.9°F).
The coldest month (with the lowest average low temperature) is December (16.2°F).
Average pressure in December
Bynum, MT
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in December
Bynum, MT
- Average wind speed in December: 10.7mph
The windiest month (with the highest average wind speed) is January (11.2mph).
The calmest months (with the lowest average wind speed) are July and August (8mph).
Average humidity in December
Bynum, MT
- Average humidity in December: 75%
The month with the highest relative humidity is January (76%).
The month with the lowest relative humidity is August (42%).
Average rainfall in December
Bynum, MT
- Average rainfall in December: 0.35"
The wettest month (with the highest rainfall) is June (1.93").
The driest month (with the least rainfall) is December (0.35").
Average rainfall days in December
Bynum, MT
- Average rainfall days in December: 3.5 days
The month with the highest number of rainy days is May (11.3 days).
The month with the least rainy days is November (2.7 days).
Average snowfall in December
Bynum, MT
- Average snowfall in December: 2.4"
The month with the highest snowfall is February (4.17").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Bynum, MT
- Average snowfall days in December: 8.3 days
The month with the highest number of snowfall days is February (11.3 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Bynum, MT
- Average daylight in December: 8h and 30min
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 30min).
- Average sunshine in December: 5h and 48min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in December
Bynum, MT
- Average sunshine days in December: 21.7 days
The month with the most sunshine days is October (23.2 days).
The month with the least sunshine days is February (15.8 days).
Average UV index in December
Bynum, MT
- 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, October, November and December (UV index 2).
Average cloud cover in December
Bynum, MT
- Average cloud cover in December: 38
The month with the most cloud cover is February (Cloud cover 41).
The month with the least cloud cover is July (Cloud cover 14).
Average visibility in December
Bynum, 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).
