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
As November transitions into December, a clear downswing in temperatures is observed, with average highs retreating from a cold 36.3°F (2.4°C) to a subzero cold 21.9°F (-5.6°C). Plentywood's average low-temperature during December nights is observed to be a frigid cold 10°F (-12.2°C).Humidity
In December, the average relative humidity is 87%.Rainfall
In Plentywood, in December, during 3.6 rainfall days, 0.51" (13mm) of precipitation is typically accumulated. In Plentywood, during the entire year, the rain falls for 93.3 days and collects up to 12.01" (305mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Plentywood, during December, snow falls for 13 days and regularly aggregates up to 3.19" (81mm) of snow. Throughout the year, there are 66.5 snowfall days, and 19.02" (483mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 8h and 18min of daylight.On the first day of the month, sunrise is at 7:30 am and sunset at 4:04 pm. On the last day of December, in Plentywood, sunrise is at 7:51 am and sunset at 4:12 pm MST.
Sunshine
In December, the average sunshine is 4.2h.UV index
In Plentywood, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index of 2 during December translates into the following directions:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Be alert! Nearly double the UV rays from the Sun can be reflected by 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?
How many days does it rain in December?
How much does it snow in Plentywood 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?
How long on average sun shines in December?
What is the UV index reading in December?
Average temperature in December
Plentywood, MT
- Average high temperature in December: 21.9°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is February (19.8°F).
- Average low temperature in December: 10°F
The month with the highest average low temperature is July (61°F).
The coldest month (with the lowest average low temperature) is February (6.3°F).
Average pressure in December
Plentywood, MT
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is February (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).
Average wind speed in December
Plentywood, MT
- Average wind speed in December: 9.9mph
The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is February (9.2mph).
Average humidity in December
Plentywood, MT
- Average humidity in December: 87%
The months with the highest relative humidity are January and February (88%).
The month with the lowest relative humidity is August (46%).
Average rainfall in December
Plentywood, MT
- Average rainfall in December: 0.51"
The wettest month (with the highest rainfall) is June (2.17").
The driest month (with the least rainfall) is February (0.47").
Average rainfall days in December
Plentywood, MT
- Average rainfall days in December: 3.6 days
The month with the highest number of rainy days is June (13.9 days).
The month with the least rainy days is February (2.6 days).
Average snowfall in December
Plentywood, MT
- Average snowfall in December: 3.19"
The month with the highest snowfall is November (3.74").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Plentywood, MT
- Average snowfall days in December: 13 days
The month with the highest number of snowfall days is February (13.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Plentywood, 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: 4h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 3h and 54min).
Average sunshine days in December
Plentywood, MT
- Average sunshine days in December: 17.2 days
The month with the most sunshine days is August (20.1 days).
The months with the least sunshine days are February and June (13.8 days).
Average UV index in December
Plentywood, MT
- Average UV index in December: 2
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in December
Plentywood, MT
- Average cloud cover in December: 56
The month with the most cloud cover is February (Cloud cover 60).
The months with the least cloud cover are July and August (Cloud cover 19).
Average visibility in December
Plentywood, MT
- Average visibility in December: 5mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
Plentywood, Montana, USA
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