Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
The coldest period in Great Falls is December, when temperatures fluctuate between an average high of 30°F (-1.1°C) and a low of 18.3°F (-7.6°C).Humidity
In Great Falls, the average relative humidity in December is 76%.Rainfall
The month with the least rainfall is December, when the rain falls for 2.7 days and typically collects 0.16" (4mm) of precipitation.Snowfall
Months with snowfall in Great Falls, Montana, are January through May, September through December. In Great Falls, in December, during 7.9 snowfall days, 1.06" (27mm) of snow is typically accumulated. Throughout the year, in Great Falls, there are 45.4 snowfall days, and 11.61" (295mm) of snow is accumulated.Daylight
The month with the shortest days in Great Falls, Montana, is December, with an average of 8h and 30min of daylight.On the first day of the month, sunrise is at 7:52 am and sunset at 4:36 pm. On the last day of December, sunrise is at 8:12 am and sunset at 4:44 pm MST.
Sunshine
The months with the least sunshine are January, February and December, with an average of 5.5h 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 of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for average individuals.Note: In December, a daily maximum UV index of 2 leads to the following instructions:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Frequently asked questions
What is the coldest month in Great Falls?
How cold is it in Great Falls in December?
What is the average humidity in December in Great Falls?
What is the driest month in Great Falls?
How many days does it rain in December in Great Falls?
How much does it snow in Great Falls in December?
What is the month with the shortest days in Great Falls?
How many hours of daylight does Great Falls have in December?
When is the sunrise / sunset in December in Great Falls?
What is the month with the least sunshine in Great Falls?
How many hours of sunshine does Great Falls have in December?
When is the lowest UV index in Great Falls?
What is the UV index reading in December in Great Falls?
Average temperature in December
Great Falls, MT
- Average high temperature in December: 30°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is December (30°F).
- Average low temperature in December: 18.3°F
The month with the highest average low temperature is August (57.7°F).
The coldest months (with the lowest average low temperature) are February and December (18.3°F).
Average pressure in December
Great Falls, 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 (29.87"Hg).
Average wind speed in December
Great Falls, MT
- Average wind speed in December: 11mph
The windiest month (with the highest average wind speed) is November (11.4mph).
The calmest month (with the lowest average wind speed) is August (7.7mph).
Average humidity in December
Great Falls, MT
- Average humidity in December: 76%
The month with the highest relative humidity is January (77%).
The month with the lowest relative humidity is August (40%).
Average rainfall in December
Great Falls, MT
- Average rainfall in December: 0.16"
The wettest month (with the highest rainfall) is June (0.87").
The driest month (with the least rainfall) is December (0.16").
Average rainfall days in December
Great Falls, MT
- Average rainfall days in December: 2.7 days
The month with the highest number of rainy days is April (9.9 days).
The month with the least rainy days is December (2.7 days).
Average snowfall in December
Great Falls, MT
- Average snowfall in December: 1.06"
The month with the highest snowfall is February (2.09").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Great Falls, MT
- Average snowfall days in December: 7.9 days
The month with the highest number of snowfall days is February (10 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Great Falls, MT
- Average daylight in December: 8h and 3min
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 3min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are January, February and December (Average sunshine: 5h and 30min).
Average sunshine days in December
Great Falls, MT
- Average sunshine days in December: 22.5 days
The month with the most sunshine days is July (26.1 days).
The months with the least sunshine days are February and April (16.2 days).
Average UV index in December
Great Falls, 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
Great Falls, MT
- Average cloud cover in December: 42
The month with the most cloud cover is February (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 13).
Average visibility in December
Great Falls, 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).
Great Falls, Montana, USA
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