December weather forecastRiverview Colony, MT
December
Weather in December
December, the first month of the winter in Riverview Colony, is also a subzero cold month, with an average temperature ranging between max 28.2°F (-2.1°C) and min 16.7°F (-8.5°C).Temperature
Temperature readings reach their annual highs in December, averaging 28.2°F (-2.1°C) and a minimum average of 16.7°F (-8.5°C).Humidity
The average relative humidity in December in Riverview Colony is 78%.Rainfall
The month with the least rainfall is December, when the rain falls for 6.9 days and typically collects 0.59" (15mm) of precipitation.Snowfall
January through May, September through December are months with snowfall in Riverview Colony. In December, it is snowing for 12 days. Throughout December, 3.7" (94mm) of snow is accumulated. Throughout the year, there are 65.1 snowfall days, and 24.69" (627mm) of snow is accumulated.Daylight
With an average of 8h and 24min of daylight, December has the shortest days of the year in Riverview Colony.On the first day of December, sunrise is at 7:54 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 8:14 am and sunset at 4:40 pm MST.
Sunshine
The months with the least sunshine are January and December, with an average of 5.3h of sunshine.UV index
The months with the lowest UV index in Riverview Colony are January through March, October through December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: In December, a daily maximum UV index of 2 leads to the following instructions:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. When the Sun is at its strongest around midday, find shade and limit exposure. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Riverview Colony, MT
- Average high temperature in December: 28.2°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is December (28.2°F).
- Average low temperature in December: 16.7°F
The month with the highest average low temperature is August (60.4°F).
The coldest month (with the lowest average low temperature) is February (16.3°F).
Average pressure in December
Riverview Colony, MT
- Average pressure in December: 30.11"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
Riverview Colony, MT
- Average wind speed in December: 10.2mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest month (with the lowest average wind speed) is August (8.5mph).
Average humidity in December
Riverview Colony, MT
- Average humidity in December: 78%
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is August (39%).
Average rainfall in December
Riverview Colony, MT
- Average rainfall in December: 0.59"
The wettest month (with the highest rainfall) is June (2.32").
The driest month (with the least rainfall) is December (0.59").
Average rainfall days in December
Riverview Colony, MT
- Average rainfall days in December: 6.9 days
The month with the highest number of rainy days is May (14.9 days).
The month with the least rainy days is January (5 days).
Average snowfall in December
Riverview Colony, MT
- Average snowfall in December: 3.7"
The month with the highest snowfall is February (5").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Riverview Colony, MT
- Average snowfall days in December: 12 days
The month with the highest number of snowfall days is January (12.5 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Riverview Colony, MT
- 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: 5h and 18min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The months with the least sunshine are January and December (Average sunshine: 5h and 18min).
Average sunshine days in December
Riverview Colony, MT
- Average sunshine days in December: 16.5 days
The month with the most sunshine days is September (19.5 days).
The month with the least sunshine days is April (11.7 days).
Average UV index in December
Riverview Colony, 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
Riverview Colony, MT
- Average cloud cover in December: 44
The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 15).
Average visibility in December
Riverview Colony, 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).
