January weather forecast and climate
Garrison, MT

Weather in January

January, the same as December, in Garrison, Montana, is a freezing cold winter month, with average temperature fluctuating between 28°F (-2.2°C) and 14.4°F (-9.8°C).

Temperature

In Garrison, Montana, the average high-temperature is almost the same as in December - a still subzero cold 28°F (-2.2°C). In Garrison, in January, the average low-temperature is 14.4°F (-9.8°C).

Humidity

January and February, with an average relative humidity of 88%, are most humid months.

Rainfall

In Garrison, it is raining for 8.4 days, with typically 1.02" (26mm) of accumulated precipitation. 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 January, it is snowing for 18.1 days. Throughout January, 8.5" (216mm) of snow is accumulated. In Garrison, during the entire year, snow falls for 125.4 days, and aggregates up to 77.91" (1979mm) of snow.

Daylight

The average length of the day in January is 9.1h.

Sunshine

January has the least sunshine of the year, with an average of 5.6h of sunshine.

UV index

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 low threat to health from the exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 2 transform into the following instructions:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in January in Garrison?

The average high-temperature, in January, is 28°F (-2.2°C), while the average low-temperature is 14.4°F (-9.8°C).

What are the most humid months in Garrison?

Months with the highest humidity are January and February, with an average relative humidity of 88%.

What is the average humidity in January in Garrison?

The average relative humidity in January in Garrison, Montana, is 88%.

How many days does it rain in January in Garrison?

In Garrison, Montana, in January, during 8.4 rainfall days, 1.02" (26mm) of precipitation is typically accumulated.

How much does it snow in Garrison in January?

In Garrison, in January, during 18.1 snowfall days, 8.5" (216mm) of snow is typically accumulated.

How many hours of daylight does Garrison have in January?

In January, the average length of the day in Garrison is 9.1h.

What is the month with the least sunshine in Garrison?

The month with the least sunshine in Garrison, Montana, is January, with an average of 5.6h of sunshine.

How many hours of sunshine does Garrison have in January?

In January, the average sunshine in Garrison, Montana, is 5.6h.

When is the lowest UV index in Garrison?

Months with the lowest UV index in Garrison, Montana, are January through April, October through December, with an average maximum UV index of 2.

What is the UV index reading in January in Garrison?

In January, the average daily maximum UV index in Garrison is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to the UV radiation.

Average temperature in January
Garrison, MT

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).

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Average pressure in January
Garrison, MT

Average pressure in January - Garrison, MT
  • Average pressure in January: 30.19"

Months with the highest atmospheric pressure are January and December (30.19").
The month with the lowest atmospheric pressure is June (29.92").

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Average wind speed in January
Garrison, MT

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).

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Average humidity in January
Garrison, MT

Average humidity in January - Garrison, MT
  • Average humidity in January: 88%

Months with the highest relative humidity are January and February (88%).
Months with the lowest relative humidity are July and August (49%).

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Average rainfall in January
Garrison, MT

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").

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Average rainfall days in January
Garrison, MT

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).

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Average snowfall in January
Garrison, MT

Average snowfall in January - Garrison, MT
  • Average snowfall in January: 8.5"

The month with the highest snowfall is February (12.76").
Months with the least snowfall are July and August (0").

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Average snowfall days in January
Garrison, MT

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).
Months with the least snowfall days are July and August (0 days).

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

Average daylight in January / Average sunshine in January - Garrison, MT
  • Average daylight in January: 9.1h

The month with the longest days is June (Average daylight: 15.8h).
The month with the shortest days is December (Average daylight: 8.6h).

  • Average sunshine in January: 5.6h

The month with the most sunshine is July (Average sunshine: 11.7h).
The month with the least sunshine is January (Average sunshine: 5.6h).

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Average sunshine days in January
Garrison, MT

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).

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Average UV index in January
Garrison, MT

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).
Months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).

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Average cloud cover in January
Garrison, MT

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).
Months with the least cloud cover are July and August (Cloud cover 15).

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Average visibility in January
Garrison, MT

Average visibility in January - Garrison, MT
  • Average visibility in January: 4mi

Months with the highest visibility are May, June, July, August, September and October (6mi).
Months with the lowest visibility are January, February, March and December (4mi).

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