December weather forecastGeraldine, MT
December
Weather in December
December, the first month of the winter in Geraldine, is also a subzero cold month, with temperature in the range of an average low of 18.5°F (-7.5°C) and an average high of 29.8°F (-1.2°C).Temperature
Geraldine witnesses the coldest weather in December, with temperatures averaging a high of 29.8°F (-1.2°C) and a low of 18.5°F (-7.5°C).Humidity
The average relative humidity in December is 76%.Rainfall
December is the month with the least rainfall. Rain falls for 5.8 days and accumulates 0.67" (17mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. In Geraldine, in December, during 10.7 snowfall days, 4.61" (117mm) of snow is typically accumulated. In Geraldine, during the entire year, snow falls for 58.3 days and aggregates up to 29.37" (746mm) of snow.Daylight
December has the shortest days of the year, with an average of 8h and 30min of daylight.On the first day of the month, sunrise is at 7:49 am and sunset at 4:31 pm. On the last day of December, sunrise is at 8:09 am and sunset at 4:39 pm MST.
Sunshine
The months with the least sunshine are January, February and December, with an average of 5.5h of sunshine.UV index
The months with the lowest UV index 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 minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum UV index of 2 during December translates into these guidelines:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Consider this! The reflection from 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
Geraldine, MT
- Average high temperature in December: 29.8°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is December (29.8°F).
- Average low temperature in December: 18.5°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 (18.1°F).
Average pressure in December
Geraldine, 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
Geraldine, MT
- Average wind speed in December: 10.4mph
The windiest months (with the highest average wind speed) are January and November (10.7mph).
The calmest month (with the lowest average wind speed) is August (8.1mph).
Average humidity in December
Geraldine, MT
- Average humidity in December: 76%
The month with the highest relative humidity is January (78%).
The month with the lowest relative humidity is August (39%).
Average rainfall in December
Geraldine, MT
- Average rainfall in December: 0.67"
The wettest month (with the highest rainfall) is June (2.05").
The driest month (with the least rainfall) is December (0.67").
Average rainfall days in December
Geraldine, MT
- Average rainfall days in December: 5.8 days
The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is January (5.3 days).
Average snowfall in December
Geraldine, MT
- Average snowfall in December: 4.61"
The month with the highest snowfall is February (5.51").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Geraldine, MT
- Average snowfall days in December: 10.7 days
The month with the highest number of snowfall days is February (12.2 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Geraldine, MT
- Average daylight in December: 8h and 30min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in December: 5h and 30min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The months with the least sunshine are January, February and December (Average sunshine: 5h and 30min).
Average sunshine days in December
Geraldine, MT
- Average sunshine days in December: 17.8 days
The month with the most sunshine days is September (19.3 days).
The month with the least sunshine days is April (11.2 days).
Average UV index in December
Geraldine, MT
- Average UV index in December: 2
The months with the highest UV index are June and 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
Geraldine, MT
- Average cloud cover in December: 42
The month with the most cloud cover is February (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 14).
Average visibility in December
Geraldine, 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).
