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 month that records the lowest temperatures, with averages ranging from a high of 27°F (-2.8°C) to a low of 14.4°F (-9.8°C).Humidity
The average relative humidity in December is 89%.Rainfall
In December, the rain falls for 5.4 days. Throughout December, 1.22" (31mm) of precipitation is accumulated. In Arlee, during the entire year, the rain falls for 92.3 days and collects up to 14.37" (365mm) of precipitation.Snowfall
January through June, September through December are months with snowfall. In December, it is snowing for 19.3 days. Throughout December, 10.04" (255mm) of snow is accumulated. Throughout the year, there are 121.1 snowfall days, and 68.31" (1735mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 8h and 36min of daylight.On the first day of December, sunrise is at 8:02 am and sunset at 4:48 pm. On the last day of the month, sunrise is at 8:22 am and sunset at 4:56 pm MST.
Sunshine
The average sunshine in December is 4.4h.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 value of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for the ordinary person.Note: In December, an average UV index of 1 transforms into the following instructions:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. To protect against the Sun's most potent rays, avoid direct exposure around midday. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year?
How cold is December?
What is the average humidity in December?
How much does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When are sunrise and sunset in December?
How many hours of sunshine does Arlee have in December?
What are the months with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Arlee, MT
- Average high temperature in December: 27°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°F).
- Average low temperature in December: 14.4°F
The month with the highest average low temperature is August (47.5°F).
The coldest month (with the lowest average low temperature) is December (14.4°F).
Average pressure in December
Arlee, MT
- Average pressure in December: 30.18"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Arlee, MT
- Average wind speed in December: 4.2mph
The windiest month (with the highest average wind speed) is April (5mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).
Average humidity in December
Arlee, MT
- Average humidity in December: 89%
The month with the highest relative humidity is January (91%).
The months with the lowest relative humidity are July and August (51%).
Average rainfall in December
Arlee, MT
- Average rainfall in December: 1.22"
The wettest month (with the highest rainfall) is April (1.61").
The driest month (with the least rainfall) is July (0.55").
Average rainfall days in December
Arlee, MT
- Average rainfall days in December: 5.4 days
The month with the highest number of rainy days is June (12.1 days).
The month with the least rainy days is February (4.5 days).
Average snowfall in December
Arlee, MT
- Average snowfall in December: 10.04"
The month with the highest snowfall is February (11.77").
The months with the least snowfall are July and August (0").
Average snowfall days in December
Arlee, MT
- Average snowfall days in December: 19.3 days
The month with the highest number of snowfall days is March (19.4 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Arlee, MT
- Average daylight in December: 8h and 4min
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 36min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is July (Average sunshine: 11h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in December
Arlee, MT
- Average sunshine days in December: 12.1 days
The month with the most sunshine days is July (22.5 days).
The month with the least sunshine days is March (9.3 days).
Average UV index in December
Arlee, MT
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in December
Arlee, MT
- Average cloud cover in December: 57
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 16).
Average visibility in December
Arlee, MT
- Average visibility in December: 4mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March, November and December (4mi).
Arlee, Montana, USA
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