Climate and monthly weather forecast
Hamilton, MT

A strong suspension bridge over a fast river in Hamilton, Montana, overlooking scenic trees and hilly landscapes over the other side of the shore
A strong suspension bridge over a fast river in Hamilton, Montana, overlooking scenic trees and hilly landscapes over the other side of the shore

Weather in January

January, like December, is another subzero cold winter month in Hamilton, Montana, with an average temperature varying between 16.2°F (-8.8°C) and 28.8°F (-1.8°C). In January, the average high-temperature is practically the same as in December - a still freezing cold 28.8°F (-1.8°C). Weather in January »

Weather in February

February, the last month of the winter in Hamilton, is another freezing cold month, with an average temperature ranging between min 15.1°F (-9.4°C) and max 28.8°F (-1.8°C). In February, the average high-temperature remains the same as in January - a still subzero cold 28.8°F (-1.8°C). Weather in February »

Weather in March

The first month of the spring, March, is a wintry month in Hamilton, Montana, with an average temperature varying between 21°F (-6.1°C) and 36°F (2.2°C). In Hamilton, Montana, the average high-temperature in March marginally rises from a subzero cold 28.8°F (-1.8°C) in February to a wintry 36°F (2.2°C). Weather in March »

Weather in April

April in Hamilton, Montana, is a frosty spring month, with temperature in the range of an average high of 43.5°F (6.4°C) and an average low of 25.9°F (-3.4°C). In April, the average high-temperature marginally rises from a wintry 36°F (2.2°C) in March to a chilly 43.5°F (6.4°C). Weather in April »

Weather in May

May, the last month of the spring in Hamilton, is a moderate month, with an average temperature varying between 33.4°F (0.8°C) and 56.7°F (13.7°C). In Hamilton, Montana, the average high-temperature in May increases from a chilly 43.5°F (6.4°C) in April to a mild 56.7°F (13.7°C). Weather in May »

Weather in June

The first month of the summer, June, is a comfortable month in Hamilton, Montana, with an average temperature ranging between max 65.3°F (18.5°C) and min 40.6°F (4.8°C). In June, the average high-temperature marginally rises from a mild 56.7°F (13.7°C) in May to an enjoyable 65.3°F (18.5°C). Weather in June »

Weather in July

July in Hamilton, Montana, is a moderately hot summer month, with an average temperature ranging between min 46.8°F (8.2°C) and max 77°F (25°C). The warmest month is July, with an average high-temperature of 77°F (25°C) and an average low-temperature of 46.8°F (8.2°C). Weather in July »

Weather in August

August, the last month of the summer in Hamilton, is another warm month, with temperature in the range of an average low of 46.9°F (8.3°C) and an average high of 76.3°F (24.6°C). In August, the average high-temperature is essentially the same as in July - a still moderately hot 76.3°F (24.6°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a comfortable month in Hamilton, Montana, with temperature in the range of an average high of 66.2°F (19°C) and an average low of 39.9°F (4.4°C). In Hamilton, the average high-temperature in September decreases from a moderately hot 76.3°F (24.6°C) in August to an enjoyable 66.2°F (19°C). Weather in September »

Weather in October

October, the same as September, is another fresh autumn month in Hamilton, Montana, with an average temperature varying between 50°F (10°C) and 30.4°F (-0.9°C). In October, the average high-temperature plummets from an enjoyable 66.2°F (19°C) in September to a fresh 50°F (10°C). Weather in October »

Weather in November

The last month of the autumn, November, is another cold month in Hamilton, Montana, with an average temperature ranging between min 21.9°F (-5.6°C) and max 36.1°F (2.3°C). In Hamilton, the average high-temperature in November decreases from a fresh 50°F (10°C) in October to a cold 36.1°F (2.3°C). Weather in November »

Weather in December

The first month of the winter, December, is still a freezing cold month in Hamilton, Montana, with an average temperature varying between 14°F (-10°C) and 26.8°F (-2.9°C). December is the coldest month, with an average high-temperature of 26.8°F (-2.9°C) and an average low-temperature of 14°F (-10°C). Weather in December »
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FAQ

What is the most humid month in Hamilton?

With an average relative humidity of 89%, January is the most humid month.

How many days does it rain in Hamilton?

Throughout the year, there are 163.6 rainfall days, and 20.83" (529mm) of precipitation is accumulated.

When does it snow in Hamilton?

January through May, September through December are months with snowfall.

How many days does it snow in Hamilton?

In Hamilton, during the entire year, snow falls for 101.1 days and aggregates up to 59.17" (1503mm) of snow.

What are the months with the least sunshine in Hamilton?

January and December, with an average of 5.4h of sunshine, are months with the least sunshine.

What is the wettest month in Hamilton?

The months with the most rainfall are February and April, with an average 2.36" (60mm) of precipitation.

What is the snowiest month in Hamilton?

February is the month with the most snowfall in Hamilton. Snow falls for 19.3 days and accumulates 13.03" (331mm) of snow.

When is the lowest UV index in Hamilton?

The months with the lowest UV index are February and December, with an average maximum UV index of 1.

When is Daylight Saving Time (DST) in Hamilton?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts in Hamilton, and the time zone changes from MST to MDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from MDT to MST.

When it does not snow in Hamilton?

In Hamilton, snow does not fall in June through August.

When are the longest days in Hamilton?

With an average of 15h and 44min of daylight, June has the longest days of the year in Hamilton, Montana.

What is the warmest month in Hamilton?

July is the warmest month, with an average high-temperature of 77°F (25°C) and an average low-temperature of 46.8°F (8.2°C).

What is the month with the most sunshine in Hamilton?

July and August, with an average of 11.7h of sunshine, are months with the most sunshine in Hamilton.

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

The month with the highest UV index in Hamilton, Montana, is July, with an average maximum UV index of 5.

What is the least humid month in Hamilton?

With an average relative humidity of 50%, August is the least humid month.

What is the driest month in Hamilton?

August is the month with the least rainfall. Rain falls for 8.7 days and accumulates 0.75" (19mm) of precipitation.

What is the coldest month in Hamilton?

The coldest month is December, with an average high-temperature of 26.8°F (-2.9°C) and an average low-temperature of 14°F (-10°C).

What is the month with the shortest days in Hamilton?

December has the shortest days of the year, with an average of 8h and 41min of daylight.

Average pressure
Hamilton, MT

Average pressure - Hamilton, MT

The month with the highest atmospheric pressure is January (30.21"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed
Hamilton, MT

Average wind speed - Hamilton, MT

The windiest month (with the highest average wind speed) is January (5.3mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).

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Average rainfall
Hamilton, MT

Average rainfall - Hamilton, MT

The wettest months (with the highest rainfall) are February and April (2.36").
The driest month (with the least rainfall) is August (0.75").

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Average rainfall days
Hamilton, MT

Average rainfall days - Hamilton, MT

The month with the highest number of rainy days is May (19.5 days).
The month with the least rainy days is July (8 days).

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Average snowfall
Hamilton, MT

Average snowfall - Hamilton, MT

The month with the highest snowfall is February (13.03").
The months with the least snowfall are June, July and August (0").

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Average snowfall days
Hamilton, MT

Average snowfall days - Hamilton, MT

The month with the highest number of snowfall days is February (19.3 days).
The months with the least snowfall days are June, July and August (0 days).

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Average daylight / Average sunshine
Hamilton, MT

Average daylight / Average sunshine - Hamilton, MT

The month with the longest days is June (Average daylight: 15h and 44min).
The month with the shortest days is December (Average daylight: 8h and 41min).

The months with the most sunshine are July and August (Average sunshine: 11h and 42min).
The months with the least sunshine are January and December (Average sunshine: 5h and 24min).

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Average sunshine days
Hamilton, MT

Average sunshine days - Hamilton, MT

The month with the most sunshine days is July (18.9 days).
The month with the least sunshine days is February (5.6 days).

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Average visibility
Hamilton, MT

Average visibility - Hamilton, MT

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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