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
January notes an average high-temperature of a still subzero cold 29.7°F (-1.3°C), subtly differing from December's 27°F (-2.8°C). An average temperature of 14.5°F (-9.7°C) is recorded in Boulder, Montana, during the nights in January.Humidity
With an average relative humidity of 86%, January is the most humid month.Rainfall
In Boulder, in January, during 7.9 rainfall days, 0.83" (21mm) of precipitation is typically accumulated. Throughout the year, in Boulder, there are 133.7 rainfall days, and 16.38" (416mm) of precipitation is accumulated.Snowfall
January through June, September through December are months with snowfall. In January, it is snowing for 16.3 days. Throughout January, 6.57" (167mm) of snow is accumulated. Throughout the year, there are 105.8 snowfall days, and 55.12" (1400mm) of snow is accumulated.Daylight
In January, the average length of the day in Boulder is 9h and 7min.On the first day of the month, sunrise is at 8:11 am and sunset at 4:52 pm. On the last day of January, in Boulder, Montana, sunrise is at 7:52 am and sunset at 5:31 pm MST.
Sunshine
The months with the least sunshine in Boulder, Montana, are January and December, with an average of 5.6h of sunshine.UV index
The average daily maximum UV index in January in Boulder is 2. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for average individuals.Note: In January, the average maximum UV index of 2 translates into the following recommendations:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is January in Boulder?
What is the most humid month in Boulder?
What is the average humidity in January in Boulder?
How many days does it rain in January in Boulder?
How many days does it snow in January in Boulder?
How many hours of daylight does Boulder have in January?
When are sunrise and sunset in January in Boulder?
What is the month with the least sunshine in Boulder?
How long on average sun shines in January in Boulder?
What is the UV index reading in January in Boulder?
Average temperature in January
Boulder, MT
- Average high temperature in January: 29.7°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is December (27°F).
- Average low temperature in January: 14.5°F
The month with the highest average low temperature is August (48.6°F).
The coldest month (with the lowest average low temperature) is December (12.6°F).
Average pressure in January
Boulder, MT
- Average pressure in January: 30.19"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in January
Boulder, MT
- Average wind speed in January: 6.5mph
The windiest months (with the highest average wind speed) are January and November (6.5mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in January
Boulder, MT
- Average humidity in January: 86%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is August (46%).
Average rainfall in January
Boulder, MT
- Average rainfall in January: 0.83"
The wettest month (with the highest rainfall) is June (2.68").
The driest month (with the least rainfall) is December (0.79").
Average rainfall days in January
Boulder, MT
- Average rainfall days in January: 7.9 days
The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is November (7.5 days).
Average snowfall in January
Boulder, MT
- Average snowfall in January: 6.57"
The month with the highest snowfall is February (9.72").
The months with the least snowfall are July and August (0").
Average snowfall days in January
Boulder, MT
- Average snowfall days in January: 16.3 days
The month with the highest number of snowfall days is February (18 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in January /
Average sunshine in January
Boulder, MT
- Average daylight in January: 9h and 1min
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 January: 5h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The months with the least sunshine are January and December (Average sunshine: 5h and 36min).
Average sunshine days in January
Boulder, MT
- Average sunshine days in January: 14.3 days
The month with the most sunshine days is September (17.9 days).
The month with the least sunshine days is February (8.5 days).
Average UV index in January
Boulder, 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 February (UV index 1).
Average cloud cover in January
Boulder, MT
- Average cloud cover in January: 44
The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 15).
Average visibility in January
Boulder, MT
- Average visibility in January: 5mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
Boulder, Montana, USA
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