Garrison
Montana, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Garrison, MT

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). In January, the average high-temperature is relatively the same as in December - a still freezing cold 28°F (-2.2°C). Weather in January »

February, the last month of the winter, in Garrison, is another freezing cold month, with average temperature varying between 12.7°F (-10.7°C) and 27.5°F (-2.5°C). In February, the average high-temperature is almost the same as in January - a still freezing cold 27.5°F (-2.5°C). Weather in February »

The first month of the spring, March, is a cold month in Garrison, Montana, with temperature in the range of an average low of 19.8°F (-6.8°C) and an average high of 35.4°F (1.9°C). In Garrison, the average high-temperature marginally rises, from a freezing cold 27.5°F (-2.5°C) in February, to a wintry 35.4°F (1.9°C). Weather in March »

April is a chilly spring month in Garrison, Montana, with temperature in the range of an average high of 43.9°F (6.6°C) and an average low of 26.1°F (-3.3°C). In Garrison, the average high-temperature in April slightly increases, from a cold 35.4°F (1.9°C) in March, to a chilly 43.9°F (6.6°C). Weather in April »

The last month of the spring, May, is a moderate month in Garrison, Montana, with average temperature varying between 55.6°F (13.1°C) and 33.6°F (0.9°C). In Garrison, the average high-temperature in May rises, from a frosty 43.9°F (6.6°C) in April, to a moderate 55.6°F (13.1°C). Weather in May »

The first month of the summer, June, is an enjoyable month in Garrison, Montana, with average temperature fluctuating between 40.3°F (4.6°C) and 65.5°F (18.6°C). In Garrison, the average high-temperature rises, from a moderate 55.6°F (13.1°C) in May, to an enjoyable 65.5°F (18.6°C). Weather in June »

July in Garrison, Montana, is a warm summer month, with temperature in the range of an average low of 46.9°F (8.3°C) and an average high of 76.8°F (24.9°C). July is the warmest month, with an average high-temperature of 76.8°F (24.9°C) and an average low-temperature of 46.9°F (8.3°C). Weather in July »

August, the last month of the summer, in Garrison, is another warm month, with temperature in the range of an average low of 47.3°F (8.5°C) and an average high of 75.2°F (24°C). In Garrison, the average high-temperature is relatively the same as in July - a still warm 75.2°F (24°C). Weather in August »

The first month of the autumn, September, is also an enjoyable month in Garrison, Montana, with temperature in the range of an average low of 41.2°F (5.1°C) and an average high of 65.7°F (18.7°C). In Garrison, the average high-temperature drops, from a moderately hot 75.2°F (24°C) in August, to a comfortable 65.7°F (18.7°C). Weather in September »

October, the same as September, in Garrison, Montana, is a frosty autumn month, with average temperature varying between 48.6°F (9.2°C) and 29.8°F (-1.2°C). In Garrison, the average high-temperature declines considerably, from an enjoyable 65.7°F (18.7°C) in September, to a frosty 48.6°F (9.2°C). Weather in October »

The last month of the autumn, November, is also a wintry month in Garrison, Montana, with average temperature fluctuating between 19.8°F (-6.8°C) and 35.2°F (1.8°C). In November, the average high-temperature drops, from a frosty 48.6°F (9.2°C) in October, to a cold 35.2°F (1.8°C). Weather in November »

The first month of the winter, December, is also a subzero cold month in Garrison, Montana, with temperature in the range of an average high of 25.7°F (-3.5°C) and an average low of 12.6°F (-10.8°C). With an average high-temperature of 25.7°F (-3.5°C) and an average low-temperature of 12.6°F (-10.8°C), December is the coldest month. Weather in December »

What is the most humid month in Garrison?

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

How many days does it rain in Garrison?

Throughout the year, in Garrison, there are 122.8 rainfall days, and 17.13" (435mm) of precipitation is accumulated.

When does it snow in Garrison?

January through June, September through December are months with snowfall in Garrison.

How much does it snow in Garrison?

In Garrison, Montana, during the entire year, snow falls for 125.4 days, and aggregates up to 77.91" (1979mm) of snow.

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.

What is the month with the lowest UV index in Garrison?

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

What is the snowiest month in Garrison?

February is the month with the most snowfall. Snow falls for 20.3 days and accumulates 12.76" (324mm) of snow.

What is the wettest month in Garrison?

The month with the most rainfall is June when the rain falls for 14.2 days and typically aggregates up to 2.52" (64mm) of precipitation.

When are the longest days in Garrison?

June has the longest days of the year, with an average of 15.8h of daylight.

What is the warmest month in Garrison?

The warmest month in Garrison, Montana, is July, with an average high-temperature of 76.8°F (24.9°C) and an average low-temperature of 46.9°F (8.3°C).

What is the least humid month in Garrison?

July and August, with an average relative humidity of 49%, are the least humid months in Garrison.

When it does not snow in Garrison?

In Garrison snow does not fall in July and August.

What month has the most sunshine in Garrison?

The month with the most sunshine is July, with an average of 11.7h of sunshine.

What is the month with the highest UV index in Garrison?

With an average maximum UV index of 5, July is the month with the highest UV index.

What is the driest month in Garrison?

August is the month with the least rainfall in Garrison. Rain falls for 7.3 days and accumulates 0.67" (17mm) of precipitation.

What is the coldest month in Garrison?

The coldest month in Garrison, Montana, is December, with an average high-temperature of 25.7°F (-3.5°C) and an average low-temperature of 12.6°F (-10.8°C).

What is the month with the shortest days in Garrison?

December has the shortest days of the year in Garrison, Montana, with an average of 8.6h of daylight.
Average temperature - Garrison, MT
Average humidity - Garrison, MT
Average rainfall - Garrison, MT
Average rainfall days - Garrison, MT
Average snowfall - Garrison, MT
Average snowfall days - Garrison, MT

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).

Average daylight / Average sunshine - Garrison, MT

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

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

Average UV index - Garrison, MT