December weather forecastMusselshell, MT
December
Weather in December
December, the first month of the winter in Musselshell, is also a subzero cold month, with an average temperature fluctuating between 31.1°F (-0.5°C) and 18.5°F (-7.5°C).Temperature
December is the coldest month, exhibiting average temperatures of 31.1°F (-0.5°C) at the peak and 18.5°F (-7.5°C) at the base.Humidity
In Musselshell, Montana, the average relative humidity in December is 74%.Rainfall
In Musselshell, during December, the rain falls for 5.5 days and regularly aggregates up to 0.59" (15mm) of precipitation. Throughout the year, there are 114.3 rainfall days, and 12.13" (308mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September through December. In Musselshell, during December, snow falls for 9.6 days and regularly aggregates up to 2.72" (69mm) of snow. Throughout the year, there are 53.5 snowfall days, and 18.58" (472mm) of snow is accumulated.Daylight
With an average of 8h and 36min of daylight, December has the shortest days of the year in Musselshell.On the first day of December in Musselshell, sunrise is at 7:36 am and sunset at 4:26 pm. On the last day of the month, sunrise is at 7:56 am and sunset at 4:35 pm MST.
Sunshine
February and December, with an average of 5.2h of sunshine, are months with the least sunshine in Musselshell.UV index
The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for average individuals.Note: In December, a daily maximum UV index of 1 leads to the following instructions:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from 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
Musselshell, MT
- Average high temperature in December: 31.1°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is December (31.1°F).
- Average low temperature in December: 18.5°F
The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is February (18°F).
Average pressure in December
Musselshell, MT
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in December
Musselshell, MT
- Average wind speed in December: 11mph
The windiest month (with the highest average wind speed) is January (11.2mph).
The calmest months (with the lowest average wind speed) are July and August (8.5mph).
Average humidity in December
Musselshell, MT
- Average humidity in December: 74%
The month with the highest relative humidity is January (77%).
The month with the lowest relative humidity is August (39%).
Average rainfall in December
Musselshell, MT
- Average rainfall in December: 0.59"
The wettest month (with the highest rainfall) is May (1.97").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days in December
Musselshell, MT
- Average rainfall days in December: 5.5 days
The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is February (4.6 days).
Average snowfall in December
Musselshell, MT
- Average snowfall in December: 2.72"
The month with the highest snowfall is February (3.78").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Musselshell, MT
- Average snowfall days in December: 9.6 days
The month with the highest number of snowfall days is February (11.1 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Musselshell, 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: 5h and 12min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The months with the least sunshine are February and December (Average sunshine: 5h and 12min).
Average sunshine days in December
Musselshell, MT
- Average sunshine days in December: 17.8 days
The month with the most sunshine days is September (19.5 days).
The month with the least sunshine days is April (12.8 days).
Average UV index in December
Musselshell, MT
- Average UV index in December: 1
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Musselshell, MT
- Average cloud cover in December: 45
The month with the most cloud cover is February (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 16).
Average visibility in December
Musselshell, 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).
