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
Coalwood observes a minor decrease in the average high-temperature with the arrival of December, falling from November's icy 42.3°F (5.7°C) to a subzero cold 28.9°F (-1.7°C). Coalwood, in December, observes a steady average low-temperature of 16.3°F (-8.7°C).Humidity
In December, the average relative humidity is 78%.Rainfall
November and December are months with the least rain when the rain falls for 2.6 days and typically aggregates up to 0.28" (7mm) of rain.Snowfall
Months with snowfall are January through May, October through December. In Coalwood, in December, during 9.2 snowfall days, 1.5" (38mm) of snow is typically accumulated. Throughout the year, there are 43.4 snowfall days, and 9.13" (232mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 8h and 42min of daylight.On the first day of the month, sunrise is at 7:23 am and sunset at 4:19 pm. On the last day of December, sunrise is at 7:43 am and sunset at 4:28 pm MST.
Sunshine
The months with the least sunshine are January, February and December, with an average of 5.1h of sunshine.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for average individuals.Note: In December, an average UV index of 2 transforms into the following instructions:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the average humidity in December?
What is the driest month?
How much does it rain in Coalwood in December?
How much does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When is the sunrise / sunset in December?
What are the months with the least sunshine?
How many hours of sunshine does Coalwood have in December?
What is the month with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Coalwood, MT
- Average high temperature in December: 28.9°F
The warmest month (with the highest average high temperature) is July (86.7°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in December: 16.3°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (15.1°F).
Average pressure in December
Coalwood, MT
- Average pressure in December: 30.13"Hg
The months with the highest atmospheric pressure are January and February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).
Average wind speed in December
Coalwood, MT
- Average wind speed in December: 9.7mph
The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest months (with the lowest average wind speed) are February and August (9.3mph).
Average humidity in December
Coalwood, MT
- Average humidity in December: 78%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is August (39%).
Average rainfall in December
Coalwood, MT
- Average rainfall in December: 0.28"
The wettest month (with the highest rainfall) is May (1.1").
The driest months (with the least rainfall) are November and December (0.28").
Average rainfall days in December
Coalwood, MT
- Average rainfall days in December: 2.6 days
The month with the highest number of rainy days is May (11.3 days).
The month with the least rainy days is December (2.6 days).
Average snowfall in December
Coalwood, MT
- Average snowfall in December: 1.5"
The month with the highest snowfall is February (2.2").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Coalwood, MT
- Average snowfall days in December: 9.2 days
The month with the highest number of snowfall days is January (10.1 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Coalwood, 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 1min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The months with the least sunshine are January, February and December (Average sunshine: 5h and 6min).
Average sunshine days in December
Coalwood, MT
- Average sunshine days in December: 19.9 days
The month with the most sunshine days is November (22.5 days).
The month with the least sunshine days is April (16.5 days).
Average UV index in December
Coalwood, 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, November and December (UV index 2).
Average cloud cover in December
Coalwood, MT
- Average cloud cover in December: 46
The months with the most cloud cover are February and December (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 15).
Average visibility in December
Coalwood, 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).
Coalwood, Montana, USA
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