January weather forecast
Missoula, MT

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The scenic area surrounding the iconic Higgins Street Bridge in Missoula, Montana
The scenic area surrounding the iconic Higgins Street Bridge in Missoula, Montana

Weather in January

As Missoula, Montana's coldest month, January is characterized by heavy and frequent snowfall. While pressure upstream holds steady, the month transitions gradually from colder to somewhat milder conditions. Compared to February, January offers shorter daylight hours, a higher relative humidity, and increased cloudiness. The average monthly temperature lingers around its lowest point, with highs reaching 30.2°F (-1°C) and lows dropping to 16.7°F (-8.5°C). Notably, the month experiences the most snowfall days with 8.8 days of accumulated snowfall equaling 1.3" (33mm) on average.

Temperature

During January, the average high-temperature in Missoula is a still freezing cold 30.2°F (-1°C), maintaining a close resemblance to that of the preceding month. Missoula's average low-temperature during January nights is observed to be a still subzero cold 16.7°F (-8.5°C).

Humidity

With an average relative humidity of 90%, January is the most humid month.

Rainfall

In Missoula, in January, it is raining for 5.5 days, with typically 0.2" (5mm) of accumulated precipitation. In Missoula, Montana, during the entire year, the rain falls for 67.5 days and collects up to 3.27" (83mm) of precipitation.

Snowfall

Months with snowfall are January through May, September through December. In Missoula, in January, during 8.8 snowfall days, 1.3" (33mm) of snow is typically accumulated. Throughout the year, there are 44 snowfall days, and 8.07" (205mm) of snow is accumulated.

Daylight

In Missoula, Montana, the average length of the day in January is 9h and 2min.
On the first day of the month, sunrise is at 8:21 am and sunset at 4:57 pm. On the last day of January, in Missoula, sunrise is at 8:01 am and sunset at 5:36 pm MST.

Sunshine

With an average of 4.9h of sunshine, January has the least sunshine of the year in Missoula, Montana.

UV index

In January, the average daily maximum UV index in Missoula is 2. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the ordinary person.
Note: A daily high UV index of 2 in January leads to these guidelines:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in Missoula in January?

Missoula in January has an average high-temperature of 30.2°F (-1°C) and an average low-temperature of 16.7°F (-8.5°C).

What is the most humid month in Missoula?

The most humid month in Missoula, Montana, is January, with an average relative humidity of 90%.

What is the average humidity in January in Missoula?

In January, the average relative humidity in Missoula, Montana, is 90%.

How many days does it rain in January in Missoula?

In Missoula, Montana, in January, it is raining for 5.5 days, with typically 0.2" (5mm) of accumulated precipitation.

How much does it snow in Missoula in January?

In Missoula, Montana, during January, snow falls for 8.8 days and regularly aggregates up to 1.3" (33mm) of snow.

How many hours of daylight does Missoula have in January?

The average day length in January is 9h and 2min.

When are sunrise and sunset in January in Missoula?

In January, on the first day of the month, sunrise is at 8:21 am and sunset at 4:57 pm. On the last day of the month, in Missoula, Montana, sunrise is at 8:01 am and sunset at 5:36 pm MST.

What is the month with the least sunshine in Missoula?

January has the least sunshine of the year, with an average of 4.9h of sunshine.

How long on average sun shines in January in Missoula?

In January, the average sunshine duration in Missoula, Montana, is 4.9h.

How high is the UV index in January in Missoula?

The average daily maximum UV index in January in Missoula, Montana, is 2. A UV Index of 2, and less, symbolizes a low health threat from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Missoula, MT

Average temperature in January - Missoula, MT
  • Average high temperature in January: 30.2°F

The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is December (28°F).

  • Average low temperature in January: 16.7°F

The month with the highest average low temperature is August (46.9°F).
The coldest month (with the lowest average low temperature) is December (15.4°F).

Average pressure in January
Missoula, MT

Average pressure in January - Missoula, 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 (29.93"Hg).

Average wind speed in January
Missoula, MT

Average wind speed in January - Missoula, MT
  • Average wind speed in January: 4.4mph

The windiest month (with the highest average wind speed) is April (5mph).
The calmest month (with the lowest average wind speed) is August (4mph).

Average humidity in January
Missoula, MT

Average humidity in January - Missoula, MT
  • Average humidity in January: 90%

The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is July (50%).

Average rainfall in January
Missoula, MT

Average rainfall in January - Missoula, MT
  • Average rainfall in January: 0.2"

The wettest month (with the highest rainfall) is April (0.47").
The driest months (with the least rainfall) are July and December (0.16").

Average rainfall days in January
Missoula, MT

Average rainfall days in January - Missoula, MT
  • Average rainfall days in January: 5.5 days

The month with the highest number of rainy days is April (8.8 days).
The month with the least rainy days is August (3.3 days).

Average snowfall in January
Missoula, MT

Average snowfall in January - Missoula, MT
  • Average snowfall in January: 1.3"

The month with the highest snowfall is February (2.36").
The months with the least snowfall are June, July and August (0").

Average snowfall days in January
Missoula, MT

Average snowfall days in January - Missoula, MT
  • Average snowfall days in January: 8.8 days

The month with the highest number of snowfall days is December (9 days).
The months with the least snowfall days are June, July and August (0 days).

Average daylight in January /
Average sunshine in January
Missoula, MT

Average daylight in January / Average sunshine in January - Missoula, MT
  • Average daylight in January: 9h and 0min

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: 4h and 5min

The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 54min).

Average sunshine days in January
Missoula, MT

Average sunshine days in January - Missoula, MT
  • Average sunshine days in January: 22.1 days

The month with the most sunshine days is July (27 days).
The month with the least sunshine days is April (17.8 days).

Average UV index in January
Missoula, MT

Average UV index in January - Missoula, 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 February and December (UV index 1).

Average cloud cover in January
Missoula, MT

Average cloud cover in January - Missoula, MT
  • Average cloud cover in January: 51

The month with the most cloud cover is February (Cloud cover 54).
The month with the least cloud cover is July (Cloud cover 14).

Average visibility in January
Missoula, MT

Average visibility in January - Missoula, 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 and December (4mi).

Missoula, Montana, USA

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