Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
Sweet Grass notes the coldest temperatures in December, with a high average of 27.1°F (-2.7°C) and a low of 15.3°F (-9.3°C).Humidity
In Sweet Grass, the average relative humidity in December is 77%.Rainfall
In Sweet Grass, during December, the rain falls for 3.5 days and regularly aggregates up to 0.43" (11mm) of precipitation. In Sweet Grass, during the entire year, the rain falls for 70.4 days and collects up to 8.46" (215mm) of precipitation.Snowfall
January through May, September through December are months with snowfall in Sweet Grass. In Sweet Grass, during December, snow falls for 10.2 days and regularly aggregates up to 2.72" (69mm) of snow. In Sweet Grass, during the entire year, snow falls for 54.3 days and aggregates up to 19.49" (495mm) of snow.Daylight
With an average of 8h and 18min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 8:01 am and sunset at 4:32 pm. On the last day of December, sunrise is at 8:21 am and sunset at 4:40 pm MST.
Sunshine
January and December, with an average of 5.6h of sunshine, are months with the least sunshine in Sweet Grass, Montana.UV index
The months with the lowest UV index in Sweet Grass are January through March, October through December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for the average person.Note: In December, the maximum UV index of 2 suggests these recommendations:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Frequently asked questions
What is the coldest month in Sweet Grass?
How cold is it in Sweet Grass in December?
What is the average humidity in December in Sweet Grass?
How many days does it rain in December in Sweet Grass?
How much does it snow in Sweet Grass in December?
What is the month with the shortest days in Sweet Grass?
What is the average length of the day in December in Sweet Grass?
When is the sunrise / sunset in December in Sweet Grass?
What is the month with the least sunshine in Sweet Grass?
How long on average sun shines in December in Sweet Grass?
What is the month with the lowest UV index in Sweet Grass?
What is the UV index reading in December in Sweet Grass?
Average temperature in December
Sweet Grass, MT
- Average high temperature in December: 27.1°F
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is December (27.1°F).
- Average low temperature in December: 15.3°F
The month with the highest average low temperature is August (55.2°F).
The coldest month (with the lowest average low temperature) is December (15.3°F).
Average pressure in December
Sweet Grass, 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 (29.87"Hg).
Average wind speed in December
Sweet Grass, MT
- Average wind speed in December: 11.4mph
The windiest month (with the highest average wind speed) is January (11.8mph).
The calmest months (with the lowest average wind speed) are July and August (8.8mph).
Average humidity in December
Sweet Grass, MT
- Average humidity in December: 77%
The month with the highest relative humidity is January (79%).
The month with the lowest relative humidity is August (43%).
Average rainfall in December
Sweet Grass, MT
- Average rainfall in December: 0.43"
The wettest month (with the highest rainfall) is June (1.77").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in December
Sweet Grass, MT
- Average rainfall days in December: 3.5 days
The month with the highest number of rainy days is May (10.4 days).
The month with the least rainy days is November (2.6 days).
Average snowfall in December
Sweet Grass, MT
- Average snowfall in December: 2.72"
The month with the highest snowfall is February (3.58").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Sweet Grass, MT
- Average snowfall days in December: 10.2 days
The month with the highest number of snowfall days is December (10.2 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Sweet Grass, MT
- Average daylight in December: 8h and 2min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- Average sunshine in December: 5h and 4min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The months with the least sunshine are January and December (Average sunshine: 5h and 36min).
Average sunshine days in December
Sweet Grass, MT
- Average sunshine days in December: 19.5 days
The month with the most sunshine days is July (23.5 days).
The month with the least sunshine days is April (17.4 days).
Average UV index in December
Sweet Grass, 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
Sweet Grass, MT
- Average cloud cover in December: 40
The month with the most cloud cover is February (Cloud cover 43).
The month with the least cloud cover is July (Cloud cover 15).
Average visibility in December
Sweet Grass, 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).
Sweet Grass, Montana, USA
Weather forecast for your location
2. Allow the app to use your location