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, with an average high of 27.9°F (-2.3°C) and a low of 16.7°F (-8.5°C), signifies the coldest month of the year.Humidity
The average relative humidity in December in Big Arm is 88%.Rainfall
In Big Arm, during December, the rain falls for 12.9 days and regularly aggregates up to 1.69" (43mm) of precipitation. In Big Arm, during the entire year, the rain falls for 160.2 days and collects up to 18.11" (460mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. In Big Arm, during December, snow falls for 19.8 days and regularly aggregates up to 10.2" (259mm) of snow. In Big Arm, during the entire year, snow falls for 99 days and aggregates up to 47.28" (1201mm) of snow.Daylight
With an average of 8h and 30min of daylight, December has the shortest days of the year in Big Arm.On the first day of December in Big Arm, Montana, sunrise is at 8:06 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 8:26 am and sunset at 4:55 pm MST.
Sunshine
In December, the average sunshine is 4.8h.UV index
January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In December, the UV index of 1 transforms into the following advice:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Frequently asked questions
What is the coldest month in Big Arm?
How cold is it in Big Arm in December?
What is the average humidity in December in Big Arm?
How much does it rain in Big Arm in December?
How much does it snow in Big Arm in December?
What is the month with the shortest days in Big Arm?
How many hours of daylight does Big Arm have in December?
When is the sunrise / sunset in December in Big Arm?
How long on average sun shines in December in Big Arm?
When is the lowest UV index in Big Arm?
How high is the UV index in December in Big Arm?
Average temperature in December
Big Arm, MT
- Average high temperature in December: 27.9°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is December (27.9°F).
- Average low temperature in December: 16.7°F
The months with the highest average low temperature are July and August (48.9°F).
The coldest month (with the lowest average low temperature) is December (16.7°F).
Average pressure in December
Big Arm, MT
- Average pressure in December: 30.16"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Big Arm, MT
- Average wind speed in December: 4mph
The windiest month (with the highest average wind speed) is April (4.8mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in December
Big Arm, MT
- Average humidity in December: 88%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is August (51%).
Average rainfall in December
Big Arm, MT
- Average rainfall in December: 1.69"
The wettest month (with the highest rainfall) is June (2.2").
The driest months (with the least rainfall) are July and August (0.55").
Average rainfall days in December
Big Arm, MT
- Average rainfall days in December: 12.9 days
The months with the highest number of rainy days are March and April (18.8 days).
The month with the least rainy days is August (7 days).
Average snowfall in December
Big Arm, MT
- Average snowfall in December: 10.2"
The month with the highest snowfall is February (10.28").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Big Arm, MT
- Average snowfall days in December: 19.8 days
The month with the highest number of snowfall days is December (19.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Big Arm, MT
- Average daylight in December: 8h and 3min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in December
Big Arm, MT
- Average sunshine days in December: 9.5 days
The month with the most sunshine days is July (21.3 days).
The month with the least sunshine days is March (6.4 days).
Average UV index in December
Big Arm, MT
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in December
Big Arm, MT
- Average cloud cover in December: 52
The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are July and August (Cloud cover 14).
Average visibility in December
Big Arm, MT
- Average visibility in December: 4mi
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February and December (4mi).
Big Arm, Montana, USA
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