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
Weather in January
Temperature
Sweet Grass marks the start of January with an average high-temperature of a still freezing cold 28.9°F (-1.7°C), hinting at a slight fluctuation from December's 27.1°F (-2.7°C). Sweet Grass, during January nights, observes an average temperature of 16.2°F (-8.8°C).Humidity
With an average relative humidity of 79%, January is the most humid month.Rainfall
In January, the rain falls for 3.9 days. Throughout January, 0.35" (9mm) of precipitation is accumulated. Throughout the year, there are 70.4 rainfall days, and 8.46" (215mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall. In Sweet Grass, during January, snow falls for 8.8 days and regularly aggregates up to 2.28" (58mm) of snow. In Sweet Grass, during the entire year, snow falls for 54.3 days and aggregates up to 19.49" (495mm) of snow.Daylight
In Sweet Grass, the average length of the day in January is 8h and 47min.On the first day of the month, sunrise is at 8:21 am and sunset at 4:40 pm. On the last day of January, sunrise is at 7:59 am and sunset at 5:22 pm MST.
Sunshine
January and December, with an average of 5.6h of sunshine, are months with the least sunshine.UV index
The months with the lowest UV index in Sweet Grass are January through March, October through December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum high daily UV index of 2 during January translates into the following directions:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in January?
What is the most humid month?
What is the average humidity in January?
How much does it rain in January?
How many days does it snow in January?
How many hours of daylight does Sweet Grass have in January?
When is the sunrise / sunset in January?
What are the months with the least sunshine?
How many hours of sunshine does Sweet Grass have in January?
What is the month with the lowest UV index?
What is the UV index intensity in January?
Average temperature in January
Sweet Grass, MT
- Average high temperature in January: 28.9°F
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is December (27.1°F).
- Average low temperature in January: 16.2°F
The month with the highest average low temperature is August (55.2°F).
The coldest month (with the lowest average low temperature) is December (15.3°F).
Average pressure in January
Sweet Grass, MT
- Average pressure in January: 30.13"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in January
Sweet Grass, MT
- Average wind speed in January: 11.8mph
The windiest month (with the highest average wind speed) is January (11.8mph).
The calmest months (with the lowest average wind speed) are July and August (8.8mph).
Average humidity in January
Sweet Grass, MT
- Average humidity in January: 79%
The month with the highest relative humidity is January (79%).
The month with the lowest relative humidity is August (43%).
Average rainfall in January
Sweet Grass, MT
- Average rainfall in January: 0.35"
The wettest month (with the highest rainfall) is June (1.77").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in January
Sweet Grass, MT
- Average rainfall days in January: 3.9 days
The month with the highest number of rainy days is May (10.4 days).
The month with the least rainy days is November (2.6 days).
Average snowfall in January
Sweet Grass, MT
- Average snowfall in January: 2.28"
The month with the highest snowfall is February (3.58").
The months with the least snowfall are June, July and August (0").
Average snowfall days in January
Sweet Grass, MT
- Average snowfall days in January: 8.8 days
The month with the highest number of snowfall days is December (10.2 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in January /
Average sunshine in January
Sweet Grass, MT
- Average daylight in January: 8h and 5min
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 18min).
- Average sunshine in January: 5h and 4min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The months with the least sunshine are January and December (Average sunshine: 5h and 36min).
Average sunshine days in January
Sweet Grass, MT
- Average sunshine days in January: 21.1 days
The month with the most sunshine days is July (23.5 days).
The month with the least sunshine days is April (17.4 days).
Average UV index in January
Sweet Grass, MT
- Average UV index in January: 2
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in January
Sweet Grass, 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 July (Cloud cover 15).
Average visibility in January
Sweet Grass, MT
- Average visibility in January: 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).
Sweet Grass, Montana, USA
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