December weather forecastBighorn, MT
December
Weather in December
The first month of the winter, December, is still a freezing cold month in Bighorn, Montana, with an average temperature varying between 18.3°F (-7.6°C) and 30.9°F (-0.6°C).Temperature
During January and December, Bighorn experiences its coldest period, with an average high-temperature of 30.9°F (-0.6°C).Humidity
In December, the average relative humidity in Bighorn is 75%.Rainfall
January, November and December are months with the least rain when the rain falls for 4 days and typically aggregates up to 0.47" (12mm) of rain.Snowfall
Months with snowfall are January through May, September through December. In Bighorn, in December, snow falls for 9.4 days, with typically accumulated 2.72" (69mm) of snow. Throughout the year, in Bighorn, there are 47 snowfall days, and 15.83" (402mm) of snow is accumulated.Daylight
The month with the shortest days in Bighorn is December, with an average of 8h and 42min of daylight.On the first day of the month, sunrise is at 7:32 am and sunset at 4:25 pm. On the last day of December, sunrise is at 7:52 am and sunset at 4:34 pm MST.
Sunshine
February and December, with an average of 5.3h of sunshine, are months with the least sunshine in Bighorn.UV index
The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index, 1 in December, converts into the following recommendations:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. The solar radiation around mid-day is intense; avoid the Sun and stay safe. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Mind you! Snow reflection can increase the intensity of 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
Bighorn, MT
- Average high temperature in December: 30.9°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The months with the lowest average high temperature are January and December (30.9°F).
- Average low temperature in December: 18.3°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).
Average pressure in December
Bighorn, 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 (29.84"Hg).
Average wind speed in December
Bighorn, MT
- Average wind speed in December: 9.4mph
The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is July (8.2mph).
Average humidity in December
Bighorn, MT
- Average humidity in December: 75%
The month with the highest relative humidity is January (79%).
The month with the lowest relative humidity is August (38%).
Average rainfall in December
Bighorn, MT
- Average rainfall in December: 0.47"
The wettest month (with the highest rainfall) is May (1.81").
The driest months (with the least rainfall) are January, November and December (0.47").
Average rainfall days in December
Bighorn, MT
- Average rainfall days in December: 4 days
The month with the highest number of rainy days is May (13.7 days).
The month with the least rainy days is February (3.8 days).
Average snowfall in December
Bighorn, MT
- Average snowfall in December: 2.72"
The month with the highest snowfall is February (3.74").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Bighorn, MT
- Average snowfall days in December: 9.4 days
The month with the highest number of snowfall days is February (10.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Bighorn, MT
- Average daylight in December: 8h and 42min
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 18min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The months with the least sunshine are February and December (Average sunshine: 5h and 18min).
Average sunshine days in December
Bighorn, MT
- Average sunshine days in December: 18.6 days
The month with the most sunshine days is November (20.9 days).
The month with the least sunshine days is April (14.2 days).
Average UV index in December
Bighorn, MT
- Average UV index in December: 1
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Bighorn, MT
- Average cloud cover in December: 44
The month with the most cloud cover is February (Cloud cover 46).
The months with the least cloud cover are July and August (Cloud cover 15).
Average visibility in December
Bighorn, 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).
