January weather forecastHarrison, MT
January
Weather in January
January, the same as December, in Harrison, Montana, is another subzero cold winter month, with an average temperature varying between 13.8°F (-10.1°C) and 30.2°F (-1°C).Temperature
Harrison's shift into January sets the average high-temperature at a still subzero cold 30.2°F (-1°C), a figure that deviates only slightly from December's 28°F (-2.2°C). Throughout the nights in January, Harrison experiences an average low-temperature of 13.8°F (-10.1°C).Humidity
The most humid month is January, with an average relative humidity of 85%.Rainfall
In Harrison, during January, the rain falls for 8.3 days and regularly aggregates up to 0.63" (16mm) of precipitation. Throughout the year, in Harrison, there are 134.2 rainfall days, and 11.34" (288mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through June, September through December. In January, it is snowing for 14.7 days. Throughout January, 4.45" (113mm) of snow is accumulated. Throughout the year, there are 79.6 snowfall days, and 30.08" (764mm) of snow is accumulated.Daylight
In Harrison, Montana, the average length of the day in January is 9h and 10min.On the first day of the month, sunrise is at 8:07 am and sunset at 4:53 pm. On the last day of January, sunrise is at 7:49 am and sunset at 5:31 pm MST.
Sunshine
With an average of 5.9h of sunshine, January has the least sunshine of the year.UV index
In Harrison, the average daily maximum UV index in January is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: An average maximum UV index of 2 in January leads to these recommendations:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Harrison, MT
- Average high temperature in January: 30.2°F
The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is December (28°F).
- Average low temperature in January: 13.8°F
The month with the highest average low temperature is August (50.5°F).
The coldest month (with the lowest average low temperature) is December (12.7°F).
Average pressure in January
Harrison, 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 (29.9"Hg).
Average wind speed in January
Harrison, MT
- Average wind speed in January: 4.8mph
The windiest month (with the highest average wind speed) is April (5.5mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in January
Harrison, MT
- Average humidity in January: 85%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (44%).
Average rainfall in January
Harrison, MT
- Average rainfall in January: 0.63"
The wettest month (with the highest rainfall) is June (1.57").
The driest month (with the least rainfall) is August (0.51").
Average rainfall days in January
Harrison, MT
- Average rainfall days in January: 8.3 days
The month with the highest number of rainy days is April (16.5 days).
The month with the least rainy days is August (7.6 days).
Average snowfall in January
Harrison, MT
- Average snowfall in January: 4.45"
The month with the highest snowfall is February (6.02").
The months with the least snowfall are July and August (0").
Average snowfall days in January
Harrison, MT
- Average snowfall days in January: 14.7 days
The month with the highest number of snowfall days is February (16.5 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in January /
Average sunshine in January
Harrison, MT
- Average daylight in January: 9h and 12min
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 48min).
- Average sunshine in January: 5h and 54min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 5h and 54min).
Average sunshine days in January
Harrison, MT
- Average sunshine days in January: 14.9 days
The month with the most sunshine days is September (18.7 days).
The month with the least sunshine days is April (9.3 days).
Average UV index in January
Harrison, MT
- Average UV index in January: 2
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in January
Harrison, MT
- Average cloud cover in January: 40
The month with the most cloud cover is February (Cloud cover 43).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility in January
Harrison, MT
- Average visibility in January: 4mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
