December weather forecastGarneill, MT
December
Weather in December
The first month of the winter, December, is still a freezing cold month in Garneill, Montana, with an average temperature ranging between max 29.3°F (-1.5°C) and min 16.7°F (-8.5°C).Temperature
In Garneill, Montana, December records the lowest average temperatures, peaking at 29.3°F (-1.5°C) and reaching a low of 16.7°F (-8.5°C).Humidity
In Garneill, Montana, the average relative humidity in December is 76%.Rainfall
The month with the least rainfall is December, when the rain falls for 7.2 days and typically collects 0.47" (12mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. In Garneill, in December, snow falls for 11.4 days, with typically accumulated 3.62" (92mm) of snow. In Garneill, during the entire year, snow falls for 72.8 days and aggregates up to 33.5" (851mm) of snow.Daylight
The month with the shortest days in Garneill is December, with an average of 8h and 36min of daylight.On the first day of December, sunrise is at 7:43 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 8:03 am and sunset at 4:41 pm MST.
Sunshine
In December, the average sunshine in Garneill is 6.5h.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 value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index of 2 in December interprets into the following recommendations:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Garneill, MT
- Average high temperature in December: 29.3°F
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is December (29.3°F).
- Average low temperature in December: 16.7°F
The months with the highest average low temperature are July and August (54.3°F).
The coldest month (with the lowest average low temperature) is February (16.3°F).
Average pressure in December
Garneill, 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
Garneill, MT
- Average wind speed in December: 10.3mph
The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in December
Garneill, 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 (45%).
Average rainfall in December
Garneill, MT
- Average rainfall in December: 0.47"
The wettest month (with the highest rainfall) is May (2.4").
The driest month (with the least rainfall) is December (0.47").
Average rainfall days in December
Garneill, MT
- Average rainfall days in December: 7.2 days
The month with the highest number of rainy days is May (18.7 days).
The months with the least rainy days are January and December (7.2 days).
Average snowfall in December
Garneill, MT
- Average snowfall in December: 3.62"
The month with the highest snowfall is April (6.61").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Garneill, MT
- Average snowfall days in December: 11.4 days
The month with the highest number of snowfall days is February (14.2 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Garneill, MT
- Average daylight in December: 8h and 36min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in December: 6h and 30min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 6h and 24min).
Average sunshine days in December
Garneill, MT
- Average sunshine days in December: 17.9 days
The month with the most sunshine days is September (19.2 days).
The month with the least sunshine days is April (9 days).
Average UV index in December
Garneill, 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
Garneill, MT
- Average cloud cover in December: 33
The month with the most cloud cover is February (Cloud cover 38).
The month with the least cloud cover is August (Cloud cover 15).
Average visibility in December
Garneill, 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).
