December weather forecastCascade, MT
December
Weather in December
December, the first month of the winter in Cascade, is still a freezing cold month, with an average temperature fluctuating between 29.5°F (-1.4°C) and 17.4°F (-8.1°C).Temperature
Temperature records mark December as the coldest month, with highs averaging 29.5°F (-1.4°C) and lows at 17.4°F (-8.1°C).Humidity
The average relative humidity in December is 77%.Rainfall
In Cascade, in December, it is raining for 4.9 days, with typically 0.67" (17mm) of accumulated precipitation. Throughout the year, there are 112.8 rainfall days, and 12.95" (329mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September through December. In Cascade, during December, snow falls for 12.4 days and regularly aggregates up to 4.37" (111mm) of snow. In Cascade, during the entire year, snow falls for 69.4 days and aggregates up to 35.35" (898mm) of snow.Daylight
December has the shortest days of the year, with an average of 8h and 36min of daylight.On the first day of the month, sunrise is at 7:53 am and sunset at 4:38 pm. On the last day of December, sunrise is at 8:13 am and sunset at 4:46 pm MST.
Sunshine
January and December, with an average of 5.4h of sunshine, are months with the least 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 minimal health hazard from unsafe exposure to UV radiation for average individuals.Note: In December, a daily maximum UV index of 2 leads to the following instructions:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Cascade, MT
- Average high temperature in December: 29.5°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is December (29.5°F).
- Average low temperature in December: 17.4°F
The month with the highest average low temperature is August (56.7°F).
The coldest month (with the lowest average low temperature) is December (17.4°F).
Average pressure in December
Cascade, MT
- Average pressure in December: 30.14"Hg
The months with the highest atmospheric pressure are January and December (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in December
Cascade, 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 (7.3mph).
Average humidity in December
Cascade, MT
- Average humidity in December: 77%
The month with the highest relative humidity is January (78%).
The month with the lowest relative humidity is August (41%).
Average rainfall in December
Cascade, MT
- Average rainfall in December: 0.67"
The wettest month (with the highest rainfall) is June (2.05").
The driest months (with the least rainfall) are January and July (0.63").
Average rainfall days in December
Cascade, MT
- Average rainfall days in December: 4.9 days
The month with the highest number of rainy days is May (15.2 days).
The month with the least rainy days is January (4.8 days).
Average snowfall in December
Cascade, MT
- Average snowfall in December: 4.37"
The month with the highest snowfall is February (6.34").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Cascade, MT
- Average snowfall days in December: 12.4 days
The month with the highest number of snowfall days is February (14.4 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Cascade, MT
- Average daylight in December: 8h and 36min
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 36min).
- Average sunshine in December: 5h and 24min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The months with the least sunshine are January and December (Average sunshine: 5h and 24min).
Average sunshine days in December
Cascade, MT
- Average sunshine days in December: 17.7 days
The month with the most sunshine days is September (18.8 days).
The month with the least sunshine days is April (10.3 days).
Average UV index in December
Cascade, 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
Cascade, MT
- Average cloud cover in December: 43
The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 14).
Average visibility in December
Cascade, 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).
