Monthly weather forecast and climate
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 average temperature ranging between min 16.2°F (-8.8°C) and max 28.8°F (-1.8°C). In January, the average high-temperature is almost the same as in December - a still subzero cold 28.8°F (-1.8°C). Weather in January »

Weather in February

The last month of the winter, February, is another freezing cold month in Hamilton, Montana, with temperature in the range of an average high of 28.8°F (-1.8°C) and an average low of 15.1°F (-9.4°C). In Hamilton, 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 average temperature ranging between min 21°F (-6.1°C) and max 36°F (2.2°C). In Hamilton, the average high-temperature slightly increases, from a freezing cold 28.8°F (-1.8°C) in February, to a wintry 36°F (2.2°C). Weather in March »

Weather in April

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

Weather in May

May, the last month of the spring, in Hamilton, is a mild month, with average temperature ranging between max 56.7°F (13.7°C) and min 33.4°F (0.8°C). In May, the average high-temperature rises, from a frosty 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 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 moderate 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 warm summer month, with temperature in the range of an average high of 77°F (25°C) and an average low of 46.8°F (8.2°C). 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). Weather in July »

Weather in August

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

Weather in September

The first month of the autumn, September, is also an enjoyable month in Hamilton, Montana, with temperature in the range of an average low of 39.9°F (4.4°C) and an average high of 66.2°F (19°C). In Hamilton, the average high-temperature in September decreases, from a warm 76.3°F (24.6°C) in August, to a comfortable 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 average temperature ranging between max 50°F (10°C) and min 30.4°F (-0.9°C). In Hamilton, Montana, the average high-temperature in October plummets, from a comfortable 66.2°F (19°C) in September, to a cool 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 average temperature varying between 36.1°F (2.3°C) and 21.9°F (-5.6°C). In Hamilton, the average high-temperature decreases, from a cool 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 temperature in the range of an average high of 26.8°F (-2.9°C) and an average low of 14°F (-10°C). 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). 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 in Hamilton.

How many days does it rain in Hamilton?

In Hamilton, Montana, during the entire year, the rain falls for 163.6 days and collects up to 20.83" (529mm) of precipitation.

When does it snow in Hamilton?

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

How much does it snow in Hamilton?

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

What is the month 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 wettest months are February and April, with an average 2.36" (60mm) of rainfall.

When does it snow the most in Hamilton?

The month with the most snowfall in Hamilton is February when snow falls for 19.3 days and typically aggregates up to 13.03" (331mm) of snow.

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

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

When it does not snow in Hamilton?

June through August are months without snowfall in Hamilton, Montana.

When are the longest days in Hamilton?

The month with the longest days is June, with an average of 15.7h of daylight.

What is the warmest month in Hamilton?

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

What is the month with the most sunshine in Hamilton?

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

When is 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?

The least humid month is August, with an average relative humidity of 50%.

What is the driest month in Hamilton?

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

What is the coldest month in Hamilton?

With an average high-temperature of 26.8°F (-2.9°C) and an average low-temperature of 14°F (-10°C), December is the coldest month in Hamilton.

What is the month with the shortest days in Hamilton?

The month with the shortest days is December, with an average of 8.7h of daylight.

Average pressure
Hamilton, MT

Average pressure - Hamilton, MT

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

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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").
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).
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: 15.7h).
The month with the shortest days is December (Average daylight: 8.7h).

Months with the most sunshine are July and August (Average sunshine: 11.7h).
Months with the least sunshine are January and December (Average sunshine: 5.4).

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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

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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