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
December, having an average high-temperature of 30.4°F (-0.9°C) and an average low-temperature of 16.7°F (-8.5°C), is the coldest month.Humidity
In December, the average relative humidity is 77%.Rainfall
The month with the least rainfall is December, when the rain falls for 3.4 days and typically collects 0.47" (12mm) of precipitation.Snowfall
Months with snowfall are January through June, September through December. In December, in Colstrip, Montana, it is snowing for 9.3 days. Throughout December, 3.15" (80mm) of snow is accumulated. Throughout the year, there are 55.2 snowfall days, and 23.5" (597mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 8h and 42min of daylight.On the first day of the month, sunrise is at 7:28 am and sunset at 4:23 pm. On the last day of December, sunrise is at 7:47 am and sunset at 4:31 pm MST.
Sunshine
In December, the average sunshine is 5.4h.UV index
January through April, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 2 during December translates into the following guidance:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year?
How cold is December in Colstrip?
What is the average humidity in December?
What is the driest month in Colstrip?
How many days does it rain in December in Colstrip?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Colstrip have in December?
What time are sunrise and sunset in December?
How many hours of sunshine does Colstrip have in December?
What is the month with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Colstrip, MT
- Average high temperature in December: 30.4°F
The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is December (30.4°F).
- Average low temperature in December: 16.7°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (16°F).
Average pressure in December
Colstrip, 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 (29.84"Hg).
Average wind speed in December
Colstrip, MT
- Average wind speed in December: 8.2mph
The windiest month (with the highest average wind speed) is April (10mph).
The calmest months (with the lowest average wind speed) are July and August (7.8mph).
Average humidity in December
Colstrip, MT
- Average humidity in December: 77%
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is August (42%).
Average rainfall in December
Colstrip, MT
- Average rainfall in December: 0.47"
The wettest month (with the highest rainfall) is May (2.56").
The driest month (with the least rainfall) is December (0.47").
Average rainfall days in December
Colstrip, MT
- Average rainfall days in December: 3.4 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is February (2.8 days).
Average snowfall in December
Colstrip, MT
- Average snowfall in December: 3.15"
The month with the highest snowfall is February (4.33").
The months with the least snowfall are July and August (0").
Average snowfall days in December
Colstrip, MT
- Average snowfall days in December: 9.3 days
The month with the highest number of snowfall days is February (10.4 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Colstrip, MT
- Average daylight in December: 8h and 4min
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: 5h and 2min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).
Average sunshine days in December
Colstrip, MT
- Average sunshine days in December: 20.5 days
The month with the most sunshine days is December (20.5 days).
The month with the least sunshine days is May (11.3 days).
Average UV index in December
Colstrip, MT
- Average UV index in December: 2
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, March, April, November and December (UV index 2).
Average cloud cover in December
Colstrip, MT
- Average cloud cover in December: 45
The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 15).
Average visibility in December
Colstrip, 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).
Colstrip, Montana, USA
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