December weather forecastPowderville, MT
December
Weather in December
December, the first month of the winter in Powderville, is still a freezing cold month, with an average temperature varying between 14.9°F (-9.5°C) and 26.6°F (-3°C).Temperature
Setting in of December comes with a decrease in the average high-temperature, moving from a wintry 40.1°F (4.5°C) in November to a subzero cold 26.6°F (-3°C). In December, the average low-temperature records at a still freezing cold 14.9°F (-9.5°C) during the nights.Humidity
In December, the average relative humidity is 82%.Rainfall
January and December are months with the least rain when the rain falls for 3.5 days and typically aggregates up to 0.55" (14mm) of rain.Snowfall
Months with snowfall are January through May, September through December. In Powderville, during December, snow falls for 11.3 days and regularly aggregates up to 3.35" (85mm) of snow. In Powderville, during the entire year, snow falls for 62.4 days and aggregates up to 21.97" (558mm) of snow.Daylight
With an average of 8h and 42min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:21 am and sunset at 4:17 pm. On the last day of December, sunrise is at 7:41 am and sunset at 4:26 pm MST.
Sunshine
The months with the least sunshine in Powderville are February and December, with an average of 4.8h of sunshine.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for the ordinary person.Note: In December, the UV index of 1 transforms into the following advice:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. Avoiding the Sun during its peak radiation time around midday is a healthy practice. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Powderville, MT
- Average high temperature in December: 26.6°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (26.1°F).
- Average low temperature in December: 14.9°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (13.3°F).
Average pressure in December
Powderville, MT
- Average pressure in December: 30.14"Hg
The months with the highest atmospheric pressure are January and February (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in December
Powderville, MT
- Average wind speed in December: 11.4mph
The windiest months (with the highest average wind speed) are April and October (11.9mph).
The calmest months (with the lowest average wind speed) are July and August (10.1mph).
Average humidity in December
Powderville, MT
- Average humidity in December: 82%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (46%).
Average rainfall in December
Powderville, MT
- Average rainfall in December: 0.55"
The wettest month (with the highest rainfall) is May (2.6").
The driest months (with the least rainfall) are January and December (0.55").
Average rainfall days in December
Powderville, MT
- Average rainfall days in December: 3.5 days
The month with the highest number of rainy days is May (15.7 days).
The month with the least rainy days is January (3.1 days).
Average snowfall in December
Powderville, MT
- Average snowfall in December: 3.35"
The month with the highest snowfall is February (3.86").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Powderville, MT
- Average snowfall days in December: 11.3 days
The month with the highest number of snowfall days is February (12 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Powderville, MT
- Average daylight in December: 8h and 42min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in December: 4h and 48min
The months with the most sunshine are July and August (Average sunshine: 11h and 36min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).
Average sunshine days in December
Powderville, MT
- Average sunshine days in December: 17.7 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is June (11.9 days).
Average UV index in December
Powderville, MT
- Average UV index in December: 1
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Powderville, MT
- Average cloud cover in December: 50
The month with the most cloud cover is February (Cloud cover 51).
The months with the least cloud cover are July and August (Cloud cover 18).
Average visibility in December
Powderville, 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).
