Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall in January
- Average snowfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
January
Weather in January
Temperature
The average high-temperature in January, at a still freezing cold 28°F (-2.2°C), reveals a modest deviation from December's 25.7°F (-3.5°C). An average low-temperature of 14.4°F (-9.8°C) marks the month of January.Humidity
The months with the highest humidity are January and February, with an average relative humidity of 88%.Rainfall
In January, the rain falls for 8.4 days. Throughout January, 1.02" (26mm) of precipitation is accumulated. Throughout the year, there are 122.8 rainfall days, and 17.13" (435mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through June, September through December. In Garrison, in January, during 18.1 snowfall days, 8.5" (216mm) of snow is typically accumulated. Throughout the year, in Garrison, there are 125.4 snowfall days, and 77.91" (1979mm) of snow is accumulated.Daylight
The average length of the day in January is 9h and 5min.On the first day of January, sunrise is at 8:15 am and sunset at 4:54 pm. On the last day of the month, sunrise is at 7:56 am and sunset at 5:33 pm MST.
Sunshine
January has the least sunshine of the year, with an average of 5.6h of sunshine.UV index
The months with the lowest UV index are January through April, October through December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for the average person.Note: The UV index of 2 during January leads to these advisories:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Boost your sun resistance with garments that are densely woven yet spacious. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in January?
What are the most humid months?
What is the average humidity in January?
How many days does it rain in January?
How many days does it snow in January?
How many hours of daylight does Garrison have in January?
When is the sunrise / sunset in January?
What is the month with the least sunshine?
How many hours of sunshine does Garrison have in January?
When is the lowest UV index?
What is the UV index reading in January?
Average temperature in January
Garrison, MT
- Average high temperature in January: 28°F
The warmest month (with the highest average high temperature) is July (76.8°F).
The month with the lowest average high temperature is December (25.7°F).
- Average low temperature in January: 14.4°F
The month with the highest average low temperature is August (47.3°F).
The coldest month (with the lowest average low temperature) is December (12.6°F).
Average pressure in January
Garrison, MT
- Average pressure in January: 30.19"Hg
The months with the highest atmospheric pressure are January and December (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in January
Garrison, MT
- Average wind speed in January: 6.3mph
The windiest months (with the highest average wind speed) are January, April and November (6.3mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in January
Garrison, MT
- Average humidity in January: 88%
The months with the highest relative humidity are January and February (88%).
The months with the lowest relative humidity are July and August (49%).
Average rainfall in January
Garrison, MT
- Average rainfall in January: 1.02"
The wettest month (with the highest rainfall) is June (2.52").
The driest month (with the least rainfall) is August (0.67").
Average rainfall days in January
Garrison, MT
- Average rainfall days in January: 8.4 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is August (7.3 days).
Average snowfall in January
Garrison, MT
- Average snowfall in January: 8.5"
The month with the highest snowfall is February (12.76").
The months with the least snowfall are July and August (0").
Average snowfall days in January
Garrison, MT
- Average snowfall days in January: 18.1 days
The month with the highest number of snowfall days is February (20.3 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in January /
Average sunshine in January
Garrison, MT
- Average daylight in January: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in January: 5h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is January (Average sunshine: 5h and 36min).
Average sunshine days in January
Garrison, MT
- Average sunshine days in January: 13.2 days
The month with the most sunshine days is July (21.5 days).
The month with the least sunshine days is April (6.3 days).
Average UV index in January
Garrison, MT
- Average UV index in January: 2
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in January
Garrison, MT
- Average cloud cover in January: 46
The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are July and August (Cloud cover 15).
Average visibility in January
Garrison, MT
- Average visibility in January: 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 and December (4mi).