December weather forecastRapelje, MT
December
Weather in December
The first month of the winter, December, is still a freezing cold month in Rapelje, Montana, with an average temperature varying between 30.9°F (-0.6°C) and 17.8°F (-7.9°C).Temperature
December, with its average high-temperature of 30.9°F (-0.6°C) and an average low-temperature of 17.8°F (-7.9°C), holds the record as the coldest month.Humidity
In Rapelje, the average relative humidity in December is 74%.Rainfall
In Rapelje, in December, it is raining for 6.8 days, with typically 0.71" (18mm) of accumulated precipitation. Throughout the year, there are 125.4 rainfall days, and 14.49" (368mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September through December. In Rapelje, in December, snow falls for 11.5 days, with typically accumulated 5.2" (132mm) of snow. In Rapelje, during the entire year, snow falls for 63.3 days and aggregates up to 39.09" (993mm) of snow.Daylight
The month with the shortest days in Rapelje is December, with an average of 8h and 42min of daylight.On the first day of December, sunrise is at 7:39 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 7:58 am and sunset at 4:42 pm MST.
Sunshine
The months with the least sunshine in Rapelje are February and December, with an average of 6.2h of sunshine.UV index
January through March, November and 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 low threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: The daily high UV index of 2 during December translates into the following recommendations:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Rapelje, MT
- Average high temperature in December: 30.9°F
The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is December (30.9°F).
- Average low temperature in December: 17.8°F
The month with the highest average low temperature is August (57.2°F).
The coldest month (with the lowest average low temperature) is February (17.4°F).
Average pressure in December
Rapelje, MT
- Average pressure in December: 30.15"Hg
The months with the highest atmospheric pressure are January and December (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in December
Rapelje, MT
- Average wind speed in December: 8.4mph
The windiest month (with the highest average wind speed) is January (8.9mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).
Average humidity in December
Rapelje, MT
- Average humidity in December: 74%
The month with the highest relative humidity is January (76%).
The month with the lowest relative humidity is August (41%).
Average rainfall in December
Rapelje, MT
- Average rainfall in December: 0.71"
The wettest month (with the highest rainfall) is May (2.6").
The driest month (with the least rainfall) is January (0.63").
Average rainfall days in December
Rapelje, MT
- Average rainfall days in December: 6.8 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is February (6.7 days).
Average snowfall in December
Rapelje, MT
- Average snowfall in December: 5.2"
The month with the highest snowfall is February (7.36").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Rapelje, MT
- Average snowfall days in December: 11.5 days
The month with the highest number of snowfall days is February (13.4 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Rapelje, MT
- Average daylight in December: 8h and 42min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in December: 6h and 12min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The months with the least sunshine are February and December (Average sunshine: 6h and 12min).
Average sunshine days in December
Rapelje, MT
- Average sunshine days in December: 17.5 days
The month with the most sunshine days is September (18.9 days).
The month with the least sunshine days is April (9.5 days).
Average UV index in December
Rapelje, 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, November and December (UV index 2).
Average cloud cover in December
Rapelje, MT
- Average cloud cover in December: 34
The month with the most cloud cover is February (Cloud cover 39).
The month with the least cloud cover is August (Cloud cover 14).
Average visibility in December
Rapelje, 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).
