January weather forecast
Garrison, MT

Weather in January

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

Temperature

In January, the average high-temperature is almost the same as in December - a still subzero cold 28°F (-2.2°C). 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 the most humid months.

Rainfall

In Garrison, during January, the rain falls for 8.4 days and regularly aggregates up to 1.02" (26mm) of precipitation. In Garrison, during the entire year, the rain falls for 122.8 days and collects up to 17.13" (435mm) of precipitation.

Snowfall

Months with snowfall are January through June, September through December. In Garrison, during January, snow falls for 18.1 days and regularly aggregates up to 8.5" (216mm) of snow. Throughout the year, in Garrison, there are 125.4 snowfall days, and 77.91" (1979mm) of snow is accumulated.

Daylight

In Garrison, the average length of the day in January is 9h and 5min.
On the first day of January, sunrise is at 8:15 am and sunset at 4:54 pm. On the last day of the month, sunrise is at 7:55 am and sunset at 5:33 pm MST.

Sunshine

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

UV index

January through April, October through December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: The average daily UV index of 2 in January transform into the following instructions:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in January in Garrison?

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

What is the most humid month in Garrison?

The months with the highest humidity in Garrison, Montana, are January and February, with an average relative humidity of 88%.

What is the average humidity in January in Garrison?

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

How many days does it rain in January in Garrison?

In Garrison, in January, it is raining for 8.4 days, with typically 1.02" (26mm) of accumulated precipitation.

How much does it snow in Garrison in January?

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

What is the average length of the day in January in Garrison?

The average day length in January in Garrison, Montana, is 9h and 5min.

When is the sunrise / sunset in January in Garrison?

On the first day of January, sunrise is at 8:15 am and sunset at 4:54 pm. On the last day of the month, sunrise is at 7:55 am and sunset at 5:33 pm MST.

What is the month with the least sunshine in Garrison?

With an average of 5.6h of sunshine, January has the least sunshine of the year in Garrison, Montana.

How long on average sun shines in January in Garrison?

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

When is the lowest UV index in Garrison?

The months with the lowest UV index are January through April, October through December, with an average maximum UV index of 2.

What is the UV index intensity in January in Garrison?

In January, the average daily maximum UV index in Garrison, Montana, is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation.
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
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"Hg

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

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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%

The months with the highest relative humidity are January and February (88%).
The 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").
The 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).
The 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: 9h and 1min

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: 5h and 4min

The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is January (Average sunshine: 5h and 36min).

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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).
The 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).
The 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

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

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