January weather forecastBig Sky, MT
January
Weather in January
In Big Sky, January weather is defined by its chilly temperatures and a significant amount of snow. The lowest temperatures for the year occur in January, dipping to 9.9°F (-12.3°C), reinforcing its position as the coldest month. Highs of 25°F (-3.9°C) do not temper the biting cold much. January also marks a specific period for winter outdoor activities, with snow blanketing the city for most of the month. Visibility is also at its least, encouraging locals and tourists alike to embrace a slower, indoor lifestyle.Temperature
The advent of January observes an average high-temperature of a still subzero cold 25°F (-3.9°C), nearly identical to December's 22.5°F (-5.3°C). Big Sky records an average nighttime low of 9.9°F (-12.3°C) in January.Humidity
The months with the highest humidity are January and February, with an average relative humidity of 90%.Rainfall
In Big Sky, in January, during 4.8 rainfall days, 1.54" (39mm) of precipitation is typically accumulated. Throughout the year, there are 116.1 rainfall days, and 23.5" (597mm) of precipitation is accumulated.Snowfall
January through December are months with snowfall. In Big Sky, in January, during 18.9 snowfall days, 12.72" (323mm) of snow is typically accumulated. Throughout the year, there are 151.6 snowfall days, and 124.06" (3151mm) of snow is accumulated.Daylight
The average length of the day in January in Big Sky is 9h and 13min.On the first day of the month, sunrise is at 8:04 am and sunset at 4:53 pm. On the last day of January, sunrise is at 7:46 am and sunset at 5:30 pm MST.
Sunshine
January has the least sunshine of the year, with an average of 4.7h of sunshine.UV index
January and February, 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 exposure to the Sun's UV rays for ordinary individuals.Note: In January, the maximum UV index of 1 suggests this advice:
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. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Big Sky, MT
- Average high temperature in January: 25°F
The warmest month (with the highest average high temperature) is July (74.8°F).
The month with the lowest average high temperature is December (22.5°F).
- Average low temperature in January: 9.9°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 (7.9°F).
Average pressure in January
Big Sky, MT
- Average pressure in January: 30.22"Hg
The month with the highest atmospheric pressure is January (30.22"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in January
Big Sky, MT
- Average wind speed in January: 7.1mph
The windiest month (with the highest average wind speed) is January (7.1mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in January
Big Sky, MT
- Average humidity in January: 90%
The months with the highest relative humidity are January and February (90%).
The month with the lowest relative humidity is August (51%).
Average rainfall in January
Big Sky, MT
- Average rainfall in January: 1.54"
The wettest months (with the highest rainfall) are April and May (2.91").
The driest month (with the least rainfall) is July (1.18").
Average rainfall days in January
Big Sky, MT
- Average rainfall days in January: 4.8 days
The month with the highest number of rainy days is June (16.6 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in January
Big Sky, MT
- Average snowfall in January: 12.72"
The month with the highest snowfall is April (19.88").
The month with the least snowfall is August (0.08").
Average snowfall days in January
Big Sky, MT
- Average snowfall days in January: 18.9 days
The month with the highest number of snowfall days is March (21 days).
The month with the least snowfall days is August (0.3 days).
Average daylight in January /
Average sunshine in January
Big Sky, MT
- Average daylight in January: 9h and 12min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in January: 4h and 42min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in January
Big Sky, MT
- Average sunshine days in January: 12.3 days
The month with the most sunshine days is September (14.5 days).
The month with the least sunshine days is May (5.7 days).
Average UV index in January
Big Sky, MT
- Average UV index in January: 1
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January and February (UV index 1).
Average cloud cover in January
Big Sky, MT
- Average cloud cover in January: 55
The month with the most cloud cover is February (Cloud cover 60).
The month with the least cloud cover is July (Cloud cover 17).
Average visibility in January
Big Sky, MT
- Average visibility in January: 4mi
The months with the highest visibility are June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March, April and December (4mi).
