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
January and December represent the coldest period, with an average high-temperature of 27.1°F (-2.7°C).Humidity
In December, the average relative humidity in Simpson is 80%.Rainfall
December is the month with the least rainfall in Simpson. Rain falls for 4.4 days and accumulates 0.31" (8mm) of precipitation.Snowfall
Months with snowfall in Simpson are January through May, September through December. In Simpson, in December, during 10.5 snowfall days, 1.97" (50mm) of snow is typically accumulated. Throughout the year, there are 53.5 snowfall days, and 14.25" (362mm) of snow is accumulated.Daylight
The month with the shortest days in Simpson is December, with an average of 8h and 18min of daylight.On the first day of December in Simpson, sunrise is at 7:54 am and sunset at 4:26 pm. On the last day of the month, sunrise is at 8:14 am and sunset at 4:33 pm MST.
Sunshine
In Simpson, the average sunshine in December is 5.4h.UV index
The months with the lowest UV index are January through March, October through December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 2 during December translates into the following guidance:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Frequently asked questions
What part of the year is the coldest in Simpson?
How cold is December in Simpson?
What is the average humidity in December in Simpson?
What is the driest month in Simpson?
How many days does it rain in December in Simpson?
How many days does it snow in December in Simpson?
What is the month with the shortest days in Simpson?
What is the average length of the day in December in Simpson?
What time are sunrise and sunset in December in Simpson?
How many hours of sunshine does Simpson have in December?
What are the months with the lowest UV index in Simpson?
How high is the UV index in December in Simpson?
Average temperature in December
Simpson, MT
- Average high temperature in December: 27.1°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The months with the lowest average high temperature are January and December (27.1°F).
- Average low temperature in December: 15.4°F
The month with the highest average low temperature is August (61.3°F).
The coldest month (with the lowest average low temperature) is February (13.5°F).
Average pressure in December
Simpson, MT
- Average pressure in December: 30.11"Hg
The months with the highest atmospheric pressure are January and February (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in December
Simpson, MT
- Average wind speed in December: 9.8mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (8.5mph).
Average humidity in December
Simpson, MT
- Average humidity in December: 80%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is August (40%).
Average rainfall in December
Simpson, MT
- Average rainfall in December: 0.31"
The wettest month (with the highest rainfall) is June (1.5").
The driest month (with the least rainfall) is December (0.31").
Average rainfall days in December
Simpson, MT
- Average rainfall days in December: 4.4 days
The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is February (4 days).
Average snowfall in December
Simpson, MT
- Average snowfall in December: 1.97"
The month with the highest snowfall is February (2.72").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Simpson, MT
- Average snowfall days in December: 10.5 days
The month with the highest number of snowfall days is February (11 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Simpson, 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 2min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is February (Average sunshine: 5h and 18min).
Average sunshine days in December
Simpson, MT
- Average sunshine days in December: 18.7 days
The month with the most sunshine days is September (20.3 days).
The month with the least sunshine days is April (12.8 days).
Average UV index in December
Simpson, 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
Simpson, MT
- Average cloud cover in December: 43
The month with the most cloud cover is February (Cloud cover 46).
The months with the least cloud cover are July and August (Cloud cover 16).
Average visibility in December
Simpson, 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).
Simpson, Montana, USA
Weather forecast for your location
2. Allow the app to use your location
