December weather forecastTrego, MT
December
Weather in December
The first month of the winter, December, is still a freezing cold month in Trego, Montana, with an average temperature varying between 13.1°F (-10.5°C) and 25.5°F (-3.6°C).Temperature
December, with its high-temperature average of 25.5°F (-3.6°C) and a low-temperature average of 13.1°F (-10.5°C), is the coldest month.Humidity
The average relative humidity in December is 93%.Rainfall
In December, the rain falls for 8.6 days. Throughout December, 1.73" (44mm) of precipitation is accumulated. Throughout the year, there are 136.3 rainfall days, and 15.35" (390mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September through December. In Trego, in December, during 22.1 snowfall days, 9.41" (239mm) of snow is typically accumulated. In Trego, during the entire year, snow falls for 110.7 days and aggregates up to 46.81" (1189mm) 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, sunrise is at 8:11 am and sunset at 4:45 pm. On the last day of the month, sunrise is at 8:32 am and sunset at 4:53 pm MST.
Sunshine
In December, the average sunshine in Trego is 3.5h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for the average person.Note: In December, the maximum UV index of 1 suggests this advice:
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 avoid the Sun's strongest rays, limit exposure around the mid-day period. Experience reduced UV exposure by about half when donning a wide-brim hat. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Trego, MT
- Average high temperature in December: 25.5°F
The warmest month (with the highest average high temperature) is July (77.4°F).
The month with the lowest average high temperature is December (25.5°F).
- Average low temperature in December: 13.1°F
The month with the highest average low temperature is August (45.1°F).
The coldest month (with the lowest average low temperature) is December (13.1°F).
Average pressure in December
Trego, 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 (29.91"Hg).
Average wind speed in December
Trego, MT
- Average wind speed in December: 3.4mph
The windiest month (with the highest average wind speed) is June (4.4mph).
The calmest month (with the lowest average wind speed) is December (3.4mph).
Average humidity in December
Trego, MT
- Average humidity in December: 93%
The month with the highest relative humidity is January (95%).
The month with the lowest relative humidity is August (55%).
Average rainfall in December
Trego, MT
- Average rainfall in December: 1.73"
The wettest month (with the highest rainfall) is March (1.85").
The driest month (with the least rainfall) is August (0.39").
Average rainfall days in December
Trego, MT
- Average rainfall days in December: 8.6 days
The month with the highest number of rainy days is April (17 days).
The month with the least rainy days is August (6.1 days).
Average snowfall in December
Trego, MT
- Average snowfall in December: 9.41"
The month with the highest snowfall is February (10").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Trego, MT
- Average snowfall days in December: 22.1 days
The month with the highest number of snowfall days is December (22.1 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Trego, MT
- Average daylight in December: 8h and 24min
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 24min).
- Average sunshine in December: 3h and 30min
The month with the most sunshine is August (Average sunshine: 11h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days in December
Trego, MT
- Average sunshine days in December: 8.5 days
The month with the most sunshine days is August (21.6 days).
The month with the least sunshine days is March (6.3 days).
Average UV index in December
Trego, 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
Trego, MT
- Average cloud cover in December: 67
The month with the most cloud cover is January (Cloud cover 70).
The month with the least cloud cover is August (Cloud cover 15).
Average visibility in December
Trego, MT
- Average visibility in December: 3mi
The months with the highest visibility are May, June, July, August and September (6mi).
The month with the lowest visibility is January (2mi).
