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

Monthly weather forecast and climate
Eureka, MT

January, like December, is another subzero cold winter month in Eureka, Montana, with average temperature varying between 15.1°F (-9.4°C) and 27.3°F (-2.6°C). In Eureka, Montana, the average high-temperature is relatively the same as in December - a still freezing cold 27.3°F (-2.6°C). Weather in January »

February, the last month of the winter, in Eureka, is also a subzero cold month, with average temperature ranging between min 19.9°F (-6.7°C) and max 28.8°F (-1.8°C). In February, the average high-temperature is almost the same as in January - a still subzero cold 28.8°F (-1.8°C). Weather in February »

The first month of the spring, March, is a cold month in Eureka, Montana, with average temperature ranging between min 27°F (-2.8°C) and max 36.3°F (2.4°C). In Eureka, the average high-temperature in March marginally rises, from a subzero cold 28.8°F (-1.8°C) in February, to a wintry 36.3°F (2.4°C). Weather in March »

April in Eureka, Montana, is a chilly spring month, with average temperature ranging between min 33.1°F (0.6°C) and max 46.4°F (8°C). In April, the average high-temperature rises, from a cold 36.3°F (2.4°C) in March, to a frosty 46.4°F (8°C). Weather in April »

May, the last month of the spring, in Eureka, is a moderate month, with temperature in the range of an average high of 59.7°F (15.4°C) and an average low of 39.9°F (4.4°C). In May, the average high-temperature rises, from a chilly 46.4°F (8°C) in April, to a mild 59.7°F (15.4°C). Weather in May »

June, the first month of the summer, in Eureka, is an enjoyable month, with temperature in the range of an average high of 66.6°F (19.2°C) and an average low of 46.9°F (8.3°C). In June, the average high-temperature marginally rises, from a mild 59.7°F (15.4°C) in May, to an enjoyable 66.6°F (19.2°C). Weather in June »

July is a warm summer month in Eureka, Montana, with temperature in the range of an average high of 77.4°F (25.2°C) and an average low of 50°F (10°C). The warmest month is July, with an average high-temperature of 77.4°F (25.2°C) and an average low-temperature of 50°F (10°C). Weather in July »

August, the last month of the summer, in Eureka, is another warm month, with average temperature fluctuating between 77.2°F (25.1°C) and 48.9°F (9.4°C). In August, the average high-temperature is essentially the same as in July - a still moderately hot 77.2°F (25.1°C). Weather in August »

September, the first month of the autumn, in Eureka, is also an enjoyable month, with average temperature ranging between max 65.8°F (18.8°C) and min 41°F (5°C). In Eureka, the average high-temperature in September decreases, from a warm 77.2°F (25.1°C) in August, to a comfortable 65.8°F (18.8°C). Weather in September »

October, like September, is another chilly autumn month in Eureka, Montana, with average temperature fluctuating between 49.1°F (9.5°C) and 33.1°F (0.6°C). In October, the average high-temperature plummets, from a comfortable 65.8°F (18.8°C) in September, to a frosty 49.1°F (9.5°C). Weather in October »

November, the last month of the autumn, in Eureka, is another cold month, with average temperature varying between 34.7°F (1.5°C) and 26.1°F (-3.3°C). In November, the average high-temperature significantly decreases, from a chilly 49.1°F (9.5°C) in October, to a wintry 34.7°F (1.5°C). Weather in November »

December, the first month of the winter, in Eureka, is also a subzero cold month, with average temperature varying between 18°F (-7.8°C) and 25.5°F (-3.6°C). The coldest month is December, with an average high-temperature of 25.5°F (-3.6°C) and an average low-temperature of 18°F (-7.8°C). Weather in December »

What is the most humid month in Eureka?

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

How many days does it rain in Eureka?

In Eureka, during the entire year, the rain falls for 136.3 days and collects up to 15.35" (390mm) of precipitation.

When does it snow in Eureka?

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

How much does it snow in Eureka?

In Eureka, Montana, during the entire year, snow falls for 110.7 days, and aggregates up to 46.81" (1189mm) of snow.

What is the month with the least sunshine in Eureka?

With an average of 3.1h of sunshine, January has the least sunshine of the year in Eureka, Montana.

When is 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.

What is the snowiest month in Eureka?

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

What is the rainiest month in Eureka?

The month with the most rainfall is March when the rain falls for 16.8 days and typically aggregates up to 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?

The warmest month in Eureka, Montana, is July, with an average high-temperature of 77.4°F (25.2°C) and an average low-temperature of 50°F (10°C).

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

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

What is the least humid month in Eureka?

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

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, with an average of 11.7h of sunshine.

What is the coldest month in Eureka?

The coldest month is December, with an average high-temperature of 25.5°F (-3.6°C) and an average low-temperature of 18°F (-7.8°C).

What is the month with the shortest days in Eureka?

December has the shortest days of the year in Eureka, with an average of 8.3h of daylight.
Average rainfall - Eureka, MT

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

Average rainfall days - Eureka, MT

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

Average snowfall - Eureka, MT
Average snowfall days - Eureka, MT

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

Average daylight / Average sunshine - Eureka, MT

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

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