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 is the coldest month, with an average high-temperature of 31.3°F (-0.4°C) and an average low-temperature of 18.1°F (-7.7°C).Humidity
In December, the average relative humidity is 74%.Rainfall
In Pompeys Pillar, in December, it is raining for 5.9 days, with typically 0.67" (17mm) of accumulated precipitation. Throughout the year, there are 103 rainfall days, and 11.97" (304mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall. In Pompeys Pillar, Montana, in December, snow falls for 10.8 days, with typically accumulated 3.94" (100mm) of snow. In Pompeys Pillar, Montana, during the entire year, snow falls for 56.7 days and aggregates up to 25.16" (639mm) of snow.Daylight
With an average of 8h and 42min of daylight, December has the shortest days of the year in Pompeys Pillar, Montana.On the first day of the month, sunrise is at 7:34 am and sunset at 4:28 pm. On the last day of December, in Pompeys Pillar, sunrise is at 7:53 am and sunset at 4:36 pm MST.
Sunshine
In Pompeys Pillar, the average sunshine in December is 5.8h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Pompeys Pillar. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for average individuals.Note: In December, the maximum UV index of 2 suggests these recommendations:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Frequently asked questions
What time of the year is the coldest in Pompeys Pillar?
How cold is December in Pompeys Pillar?
What is the average humidity in December in Pompeys Pillar?
How much does it rain in Pompeys Pillar in December?
How many days does it snow in December in Pompeys Pillar?
What is the month with the shortest days in Pompeys Pillar?
What is the average length of the day in December in Pompeys Pillar?
When are sunrise and sunset in December in Pompeys Pillar?
How long on average sun shines in December in Pompeys Pillar?
What is the month with the lowest UV index in Pompeys Pillar?
How high is the UV index in December in Pompeys Pillar?
Average temperature in December
Pompeys Pillar, MT
- Average high temperature in December: 31.3°F
The warmest month (with the highest average high temperature) is July (87.3°F).
The month with the lowest average high temperature is December (31.3°F).
- Average low temperature in December: 18.1°F
The month with the highest average low temperature is July (62.8°F).
The coldest month (with the lowest average low temperature) is January (17.8°F).
Average pressure in December
Pompeys Pillar, 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 (29.85"Hg).
Average wind speed in December
Pompeys Pillar, MT
- Average wind speed in December: 8.2mph
The windiest month (with the highest average wind speed) is April (9.1mph).
The calmest month (with the lowest average wind speed) is July (7.3mph).
Average humidity in December
Pompeys Pillar, MT
- Average humidity in December: 74%
The month with the highest relative humidity is January (78%).
The month with the lowest relative humidity is August (38%).
Average rainfall in December
Pompeys Pillar, MT
- Average rainfall in December: 0.67"
The wettest month (with the highest rainfall) is May (1.81").
The driest month (with the least rainfall) is August (0.63").
Average rainfall days in December
Pompeys Pillar, MT
- Average rainfall days in December: 5.9 days
The month with the highest number of rainy days is May (13.6 days).
The month with the least rainy days is December (5.9 days).
Average snowfall in December
Pompeys Pillar, MT
- Average snowfall in December: 3.94"
The month with the highest snowfall is February (5.43").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Pompeys Pillar, MT
- Average snowfall days in December: 10.8 days
The month with the highest number of snowfall days is February (12.5 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Pompeys Pillar, 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 5min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 36min).
Average sunshine days in December
Pompeys Pillar, MT
- Average sunshine days in December: 17.3 days
The month with the most sunshine days is September (21.5 days).
The month with the least sunshine days is February (13.3 days).
Average UV index in December
Pompeys Pillar, 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
Pompeys Pillar, 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 13).
Average visibility in December
Pompeys Pillar, 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).
Pompeys Pillar, Montana, USA
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