December weather forecastLibby, MT
December
Weather in December
December witnesses the reappearance of winter's peak in Libby, Montana, with average high temperatures plummeting further down. The stark contrast in temperatures between December and the prior month of November amplifies the onset of winter. The highest snowfall of the year measuring up to 11.1" (282mm) becomes a striking feature of this month. Limited daylight hours, decreased visibility, and higher humidity make December the coldest month of the year.Temperature
December, noted for its average high-temperature of 27.1°F (-2.7°C) and an average low-temperature of 15.1°F (-9.4°C), is considered the coldest month.Humidity
The average relative humidity in December in Libby is 92%.Rainfall
The month with the most rainfall in Libby is December, when the rain falls for 9.6 days and typically aggregates up to 2.24" (57mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. In Libby, during December, snow falls for 20 days and regularly aggregates up to 11.1" (282mm) of snow. Throughout the year, there are 91.8 snowfall days, and 49.33" (1253mm) of snow is accumulated.Daylight
December has the shortest days of the year in Libby, with an average of 8h and 24min of daylight.On the first day of December, sunrise is at 8:13 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 8:33 am and sunset at 4:57 pm MST.
Sunshine
In Libby, the average sunshine in December is 3.5h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: The UV index of 1 in December translates into these instructions:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Libby, MT
- Average high temperature in December: 27.1°F
The warmest month (with the highest average high temperature) is August (77.5°F).
The month with the lowest average high temperature is December (27.1°F).
- Average low temperature in December: 15.1°F
The month with the highest average low temperature is August (47.3°F).
The coldest month (with the lowest average low temperature) is December (15.1°F).
Average pressure in December
Libby, MT
- Average pressure in December: 30.17"Hg
The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Libby, MT
- Average wind speed in December: 3.5mph
The windiest months (with the highest average wind speed) are April and June (4.5mph).
The calmest month (with the lowest average wind speed) is December (3.5mph).
Average humidity in December
Libby, MT
- Average humidity in December: 92%
The month with the highest relative humidity is January (94%).
The month with the lowest relative humidity is August (53%).
Average rainfall in December
Libby, MT
- Average rainfall in December: 2.24"
The wettest month (with the highest rainfall) is December (2.24").
The driest month (with the least rainfall) is August (0.43").
Average rainfall days in December
Libby, MT
- Average rainfall days in December: 9.6 days
The month with the highest number of rainy days is April (17.5 days).
The month with the least rainy days is August (5.9 days).
Average snowfall in December
Libby, MT
- Average snowfall in December: 11.1"
The month with the highest snowfall is January (11.34").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Libby, MT
- Average snowfall days in December: 20 days
The month with the highest number of snowfall days is December (20 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Libby, 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: 3h and 30min
The months with the most sunshine are July and August (Average sunshine: 11h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in December
Libby, MT
- Average sunshine days in December: 8.6 days
The month with the most sunshine days is August (22.8 days).
The month with the least sunshine days is February (7.4 days).
Average UV index in December
Libby, MT
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in December
Libby, MT
- Average cloud cover in December: 67
The month with the most cloud cover is January (Cloud cover 70).
The month with the least cloud cover is August (Cloud cover 15).
Average visibility in December
Libby, MT
- Average visibility in December: 3mi
The months with the highest visibility are May, June, July, August and September (6mi).
The month with the lowest visibility is January (2mi).
