Climate and monthly weather forecast
Harrison, MT

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Weather in January

January, like December, is a freezing cold winter month in Harrison, Montana, with an average temperature varying between 13.8°F (-10.1°C) and 30.2°F (-1°C). With the onset of January, the average high-temperature stands at a still subzero cold 30.2°F (-1°C), closely aligned with December's 28°F (-2.2°C). Weather in January »

Weather in February

The last month of the winter, February, is also a subzero cold month in Harrison, Montana, with temperature in the range of an average low of 14.4°F (-9.8°C) and an average high of 30.9°F (-0.6°C). Harrison in February witnesses an average high-temperature of a still subzero cold 30.9°F (-0.6°C), indicating a slight variation from January's 30.2°F (-1°C). Weather in February »

Weather in March

The first month of the spring, March, is an icy month in Harrison, Montana, with an average temperature fluctuating between 24.1°F (-4.4°C) and 41°F (5°C). The transition to March introduces an increase in the average high-temperature, shifting from a freezing cold 30.9°F (-0.6°C) in February to a wintry 41°F (5°C). Weather in March »

Weather in April

April is a fresh spring month in Harrison, Montana, with an average temperature ranging between max 50.4°F (10.2°C) and min 30.4°F (-0.9°C). April comes with an increase, with the average high-temperature moving from an icy 41°F (5°C) in March to a fresh 50.4°F (10.2°C). Weather in April »

Weather in May

The last month of the spring, May, is an enjoyable month in Harrison, Montana, with an average temperature ranging between min 37.9°F (3.3°C) and max 62.6°F (17°C). The commencement of May sees a shift in the average high-temperature, moving from a cool 50.4°F (10.2°C) in April to a comfortable 62.6°F (17°C). Weather in May »

Weather in June

The first month of the summer, June, is a pleasant month in Harrison, Montana, with an average temperature ranging between min 44.4°F (6.9°C) and max 72.9°F (22.7°C). June brings a rise in the average high-temperature, transitioning from May's enjoyable 62.6°F (17°C) to a pleasant 72.9°F (22.7°C). Weather in June »

Weather in July

July in Harrison, Montana, is a warm summer month, with an average temperature varying between 83.5°F (28.6°C) and 50.2°F (10.1°C). During the warmest month, July, temperatures average a high of 83.5°F (28.6°C) and a low of 50.2°F (10.1°C). The heat index for July is appraised at 84.2°F (29°C). Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Harrison, Montana, with temperature in the range of an average high of 81.9°F (27.7°C) and an average low of 50.5°F (10.3°C). With the start of August, Harrison measures an average high-temperature of a still warm 81.9°F (27.7°C), not significantly differing from July's 83.5°F (28.6°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a pleasant month in Harrison, Montana, with an average temperature ranging between min 44.4°F (6.9°C) and max 70.9°F (21.6°C). With September's arrival, Harrison's weather changes as the average high-temperature falls from a moderately hot 81.9°F (27.7°C) in August to an agreeable 70.9°F (21.6°C). Weather in September »

Weather in October

October, the same as September, is another fresh autumn month in Harrison, Montana, with an average temperature fluctuating between 53.8°F (12.1°C) and 33.4°F (0.8°C). October's arrival brings a noticeable temperature shift, dropping from a pleasant 70.9°F (21.6°C) in September to a fresh 53.8°F (12.1°C). Weather in October »

Weather in November

November, the last month of the autumn in Harrison, is also an icy month, with an average temperature fluctuating between 22.5°F (-5.3°C) and 39°F (3.9°C). November's arrival signals a significant decrease in average high-temperatures, falling from October's fresh 53.8°F (12.1°C) to a cold 39°F (3.9°C). Weather in November »

Weather in December

December, the first month of the winter in Harrison, is also a subzero cold month, with an average temperature ranging between min 12.7°F (-10.7°C) and max 28°F (-2.2°C). December, with an average high of 28°F (-2.2°C) and a low of 12.7°F (-10.7°C), signifies the coldest month of the year. Weather in December »
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Frequently asked questions

What is the most humid month in Harrison?

With an average relative humidity of 85%, January is the most humid month in Harrison, Montana.

How many days does it rain in Harrison?

In Harrison, during the entire year, the rain falls for 134.2 days and collects up to 11.34" (288mm) of precipitation.

When does it snow in Harrison?

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

How many days does it snow in Harrison?

In Harrison, Montana, during the entire year, snow falls for 79.6 days and aggregates up to 30.08" (764mm) of snow.

What is the month with the least sunshine in Harrison?

With an average of 5.9h of sunshine, January has the least sunshine of the year.

When does it snow the most in Harrison?

The month with the most snowfall in Harrison is February, when snow falls for 16.5 days and typically aggregates up to 6.02" (153mm) of snow.

When is Daylight Saving Time (DST) in Harrison?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Harrison, and the time zone changes from MST to MDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from MDT to MST.

What is the wettest month in Harrison?

The month with the most rainfall in Harrison, Montana, is June, when the rain falls for 13.5 days and typically aggregates up to 1.57" (40mm) of precipitation.

When are the longest days in Harrison?

June has the longest days of the year in Harrison, with an average of 15h and 42min of daylight.

What month is the hottest in Harrison?

July is the month when Harrison, Montana, experiences its warmest temperatures, averaging a high of 83.5°F (28.6°C) and a low of 50.2°F (10.1°C).

When it does not snow in Harrison?

In Harrison, Montana, snow does not fall in July and August.

What month has the most sunshine in Harrison?

July has the most sunshine of the year in Harrison, with an average of 11.8h of sunshine.

When is the highest UV index in Harrison?

July is the month with the highest UV index in Harrison, with an average maximum UV index of 6.

What is the least humid month in Harrison?

The least humid month is August, with an average relative humidity of 44%.

What is the driest month in Harrison?

August is the month with the least rainfall. Rain falls for 7.6 days and accumulates 0.51" (13mm) of precipitation.

What is the coldest time of year in Harrison?

December is the month when Harrison experiences its coldest temperatures, averaging a high of 28°F (-2.2°C) and a low of 12.7°F (-10.7°C).

What is the month with the shortest days in Harrison?

The month with the shortest days is December, with an average of 8h and 48min of daylight.

When is the lowest UV index in Harrison?

December is the month with the lowest UV index, with an average maximum UV index of 1.

Average temperature
Harrison, MT

Average temperature - Harrison, MT

The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is December (28°F).

The month with the highest average low temperature is August (50.5°F).
The coldest month (with the lowest average low temperature) is December (12.7°F).

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Average pressure
Harrison, MT

Average pressure - Harrison, MT

The months with the highest atmospheric pressure are January and December (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

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Average wind speed
Harrison, MT

Average wind speed - Harrison, MT

The windiest month (with the highest average wind speed) is April (5.5mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).

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Average rainfall
Harrison, MT

Average rainfall - Harrison, MT

The wettest month (with the highest rainfall) is June (1.57").
The driest month (with the least rainfall) is August (0.51").

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Average rainfall days
Harrison, MT

Average rainfall days - Harrison, MT

The month with the highest number of rainy days is April (16.5 days).
The month with the least rainy days is August (7.6 days).

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Average snowfall
Harrison, MT

Average snowfall - Harrison, MT

The month with the highest snowfall is February (6.02").
The months with the least snowfall are July and August (0").

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Average snowfall days
Harrison, MT

Average snowfall days - Harrison, MT

The month with the highest number of snowfall days is February (16.5 days).
The months with the least snowfall days are July and August (0 days).

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Average daylight / Average sunshine
Harrison, MT

Average daylight / Average sunshine - Harrison, MT

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 48min).

The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 5h and 54min).

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Average sunshine days
Harrison, MT

Average sunshine days - Harrison, MT

The month with the most sunshine days is September (18.7 days).
The month with the least sunshine days is April (9.3 days).

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Average visibility
Harrison, MT

Average visibility - Harrison, MT

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

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Harrison, Montana, USA

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