Monthly weather forecast and climate
Eureka, MT

Weather in January

January, the same as December, in Eureka, Montana, is another subzero cold winter month, with average temperature ranging between min 14.2°F (-9.9°C) and max 27.3°F (-2.6°C). In January, the average high-temperature is relatively the same as in December - a still subzero cold 27.3°F (-2.6°C). Weather in January »

Weather in February

The last month of the winter, February, is also a subzero cold month in Eureka, Montana, with average temperature ranging between max 28.8°F (-1.8°C) and min 13.8°F (-10.1°C). In February, the average high-temperature is almost the same as in January - a still freezing 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 Eureka, Montana, with temperature in the range of an average low of 21.2°F (-6°C) and an average high of 36.3°F (2.4°C). In Eureka, the average high-temperature in March marginally rises, from a freezing cold 28.8°F (-1.8°C) in February, to a wintry 36.3°F (2.4°C). Weather in March »

Weather in April

April in Eureka, Montana, is a frosty spring month, with average temperature varying between 46.4°F (8°C) and 27°F (-2.8°C). In Eureka, Montana, the average high-temperature increases, from a wintry 36.3°F (2.4°C) in March, to a frosty 46.4°F (8°C). Weather in April »

Weather in May

May, the last month of the spring, in Eureka, is a moderate month, with average temperature ranging between min 34.5°F (1.4°C) and max 59.7°F (15.4°C). In May, the average high-temperature rises, from a frosty 46.4°F (8°C) in April, to a moderate 59.7°F (15.4°C). Weather in May »

Weather in June

The first month of the summer, June, is an enjoyable month in Eureka, Montana, with temperature in the range of an average high of 66.6°F (19.2°C) and an average low of 40.5°F (4.7°C). In Eureka, the average high-temperature in June slightly increases, from a moderate 59.7°F (15.4°C) in May, to an enjoyable 66.6°F (19.2°C). Weather in June »

Weather in July

July is a moderately hot summer month in Eureka, Montana, with temperature in the range of an average low of 44.4°F (6.9°C) and an average high of 77.4°F (25.2°C). July is the warmest month, with an average high-temperature of 77.4°F (25.2°C) and an average low-temperature of 44.4°F (6.9°C). Weather in July »

Weather in August

August, the last month of the summer, in Eureka, is another warm month, with temperature in the range of an average low of 45.1°F (7.3°C) and an average high of 77.2°F (25.1°C). In Eureka, Montana, the average high-temperature in August is practically the same as in July - a still moderately hot 77.2°F (25.1°C). Weather in August »

Weather in September

The first month of the autumn, September, is also an enjoyable month in Eureka, Montana, with average temperature ranging between max 65.8°F (18.8°C) and min 38.7°F (3.7°C). In Eureka, the average high-temperature decreases, from a warm 77.2°F (25.1°C) in August, to an enjoyable 65.8°F (18.8°C). Weather in September »

Weather in October

October, like September, is a frosty autumn month in Eureka, Montana, with average temperature fluctuating between 30.6°F (-0.8°C) and 49.1°F (9.5°C). In Eureka, the average high-temperature in October plummets, from an enjoyable 65.8°F (18.8°C) in September, to a chilly 49.1°F (9.5°C). Weather in October »

Weather in November

The last month of the autumn, November, is another cold month in Eureka, Montana, with average temperature ranging between min 22.1°F (-5.5°C) and max 34.7°F (1.5°C). In Eureka, Montana, the average high-temperature in November significantly decreases, from a frosty 49.1°F (9.5°C) in October, to a wintry 34.7°F (1.5°C). Weather in November »

Weather in December

December, the first month of the winter, in Eureka, is still a freezing cold month, with average temperature fluctuating between 25.5°F (-3.6°C) and 13.1°F (-10.5°C). December is the coldest month, with an average high-temperature of 25.5°F (-3.6°C) and an average low-temperature of 13.1°F (-10.5°C). Weather in December »
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FAQ

What is the most humid month in Eureka?

With an average relative humidity of 95%, January is the most humid month in Eureka, Montana.

How much does it rain in Eureka?

Throughout the year, in Eureka, there are 136.3 rainfall days, and 15.35" (390mm) of precipitation is accumulated.

When does it snow in Eureka?

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

How many days does it snow in Eureka?

Throughout the year, in Eureka, there are 110.7 snowfall days, and 46.81" (1189mm) of snow is accumulated.

What is the month with the least sunshine in Eureka?

The month with the least sunshine in Eureka is January, with an average of 3.1h of sunshine.

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

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

When does it snow the most in Eureka?

February is the month with the most snowfall in Eureka, Montana. Snow falls for 20.5 days and accumulates 10" (254mm) of snow.

What is the rainiest month in Eureka?

March is the month with the most rainfall. Rain falls for 16.8 days and accumulates 1.85" (47mm) of precipitation.

When it does not snow in Eureka?

June through August are months without snowfall.

When are the longest days in Eureka?

The month with the longest days is June, with an average of 16.1h of daylight.

What is the warmest month in Eureka?

With an average high-temperature of 77.4°F (25.2°C) and an average low-temperature of 44.4°F (6.9°C), July is the warmest month.

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

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

What is the least humid month in Eureka?

With an average relative humidity of 55%, August is the least humid month.

What is the driest month in Eureka?

August is the month with the least rainfall. Rain falls for 6.1 days and accumulates 0.39" (10mm) of precipitation.

What month has the most sunshine in Eureka?

August has the most sunshine of the year in Eureka, Montana, with an average of 11.7h of sunshine.

What is the coldest month in Eureka?

December is the coldest month, with an average high-temperature of 25.5°F (-3.6°C) and an average low-temperature of 13.1°F (-10.5°C).

What is the month with the shortest days in Eureka?

The month with the shortest days is December, with an average of 8.3h of daylight.

Average temperature
Eureka, MT

Average temperature - Eureka, MT

The warmest month (with the highest average high temperature) is July (77.4°F).
The month with the lowest average high temperature is December (25.5°F).

The month with the highest average low temperature is August (45.1°F).
The coldest month (with the lowest average low temperature) is December (13.1°F).

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Average pressure
Eureka, MT

Average pressure - Eureka, MT

The month with the highest atmospheric pressure is January (30.17").
The month with the lowest atmospheric pressure is June (29.91").

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Average wind speed
Eureka, MT

Average wind speed - Eureka, MT

The windiest month (with the highest average wind speed) is June (4.4mph).
The calmest month (with the lowest average wind speed) is December (3.4mph).

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Average rainfall
Eureka, MT

Average rainfall - Eureka, MT

The wettest month (with the highest rainfall) is March (1.85").
The driest month (with the least rainfall) is August (0.39").

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Average rainfall days
Eureka, MT

Average rainfall days - Eureka, MT

The month with the highest number of rainy days is April (17 days).
The month with the least rainy days is August (6.1 days).

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Average snowfall
Eureka, MT

Average snowfall - Eureka, MT

The month with the highest snowfall is February (10").
Months with the least snowfall are June, July and August (0").

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Average snowfall days
Eureka, MT

Average snowfall days - Eureka, MT

The month with the highest number of snowfall days is December (22.1 days).
Months with the least snowfall days are June, July and August (0 days).

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Average daylight / Average sunshine
Eureka, MT

Average daylight / Average sunshine - Eureka, MT

The month with the longest days is June (Average daylight: 16.1h).
The month with the shortest days is December (Average daylight: 8.3h).

The month with the most sunshine is August (Average sunshine: 11.7h).
The month with the least sunshine is January (Average sunshine: 3.1h).

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Average sunshine days
Eureka, MT

Average sunshine days - Eureka, MT

The month with the most sunshine days is August (21.6 days).
The month with the least sunshine days is March (6.3 days).

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