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, known for its average high temperature of 27.1°F (-2.7°C) and an average low temperature of 15.3°F (-9.3°C), is the coldest month.Humidity
In December, the average relative humidity in Heart Butte is 77%.Rainfall
In Heart Butte, during December, the rain falls for 3.5 days and regularly aggregates up to 0.43" (11mm) of precipitation. Throughout the year, in Heart Butte, there are 70.4 rainfall days, and 8.46" (215mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall in Heart Butte. In Heart Butte, during December, snow falls for 10.2 days and regularly aggregates up to 2.72" (69mm) of snow. In Heart Butte, during the entire year, snow falls for 54.3 days and aggregates up to 19.49" (495mm) of snow.Daylight
The month with the shortest days is December, with an average of 8h and 24min of daylight.On the first day of December in Heart Butte, sunrise is at 8:02 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 8:22 am and sunset at 4:47 pm MST.
Sunshine
January and December, with an average of 5.6h of sunshine, are months with the least sunshine.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 value of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for average individuals.Note: The UV index of 2 during December leads to these advisories:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Frequently asked questions
What is the coldest time of year in Heart Butte?
How cold is December in Heart Butte?
What is the average humidity in December in Heart Butte?
How many days does it rain in December in Heart Butte?
How much does it snow in Heart Butte in December?
What is the month with the shortest days in Heart Butte?
How many hours of daylight does Heart Butte have in December?
What time are sunrise and sunset in December in Heart Butte?
What is the month with the least sunshine in Heart Butte?
How many hours of sunshine does Heart Butte have in December?
What is the month with the lowest UV index in Heart Butte?
What is the UV index intensity in December in Heart Butte?
Average temperature in December
Heart Butte, 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
Heart Butte, 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
Heart Butte, 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
Heart Butte, 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
Heart Butte, 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
Heart Butte, 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
Heart Butte, 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
Heart Butte, 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
Heart Butte, MT
- Average daylight in December: 8h and 2min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- 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
Heart Butte, 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
Heart Butte, 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
Heart Butte, 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
Heart Butte, 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).
Heart Butte, Montana, USA
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