Monthly weather forecast and climate
Plains, MT

Weather in January

January, the same as December, in Plains, Montana, is a freezing cold winter month, with average temperature fluctuating between 30.7°F (-0.7°C) and 17.6°F (-8°C). In January, the average high-temperature is relatively the same as in December - a still freezing cold 30.7°F (-0.7°C). Weather in January »

Weather in February

The last month of the winter, February, is also a subzero cold month in Plains, Montana, with average temperature ranging between min 17.2°F (-8.2°C) and max 31.6°F (-0.2°C). In Plains, the average high-temperature is practically the same as in January - a still subzero cold 31.6°F (-0.2°C). Weather in February »

Weather in March

The first month of the spring, March, is a wintry month in Plains, Montana, with average temperature ranging between max 38.8°F (3.8°C) and min 22.6°F (-5.2°C). In Plains, Montana, the average high-temperature in March slightly increases, from a freezing cold 31.6°F (-0.2°C) in February, to a wintry 38.8°F (3.8°C). Weather in March »

Weather in April

April is a frosty spring month in Plains, Montana, with average temperature fluctuating between 27.9°F (-2.3°C) and 47.1°F (8.4°C). In Plains, the average high-temperature in April slightly increases, from a cold 38.8°F (3.8°C) in March, to a frosty 47.1°F (8.4°C). Weather in April »

Weather in May

The last month of the spring, May, is a moderate month in Plains, Montana, with temperature in the range of an average high of 60.1°F (15.6°C) and an average low of 34.3°F (1.3°C). In Plains, the average high-temperature rises, from a frosty 47.1°F (8.4°C) in April, to a moderate 60.1°F (15.6°C). Weather in May »

Weather in June

The first month of the summer, June, is a comfortable month in Plains, Montana, with average temperature varying between 40.3°F (4.6°C) and 66.9°F (19.4°C). In June, the average high-temperature slightly increases, from a moderate 60.1°F (15.6°C) in May, to an enjoyable 66.9°F (19.4°C). Weather in June »

Weather in July

July is a warm summer month in Plains, Montana, with average temperature varying between 78.8°F (26°C) and 45.1°F (7.3°C). The warmest months are July and August, with an average high-temperature of 78.8°F (26°C). Weather in July »

Weather in August

August, the last month of the summer, in Plains, is also a moderately hot month, with average temperature varying between 45.7°F (7.6°C) and 78.8°F (26°C). July and August, with an average high-temperature of 78.8°F (26°C), are the warmest months. Weather in August »

Weather in September

September, the first month of the autumn, in Plains, is still a comfortable month, with average temperature fluctuating between 39.7°F (4.3°C) and 67.3°F (19.6°C). In September, the average high-temperature drops, from a warm 78.8°F (26°C) in August, to an enjoyable 67.3°F (19.6°C). Weather in September »

Weather in October

October, like September, in Plains, Montana, is a cool autumn month, with average temperature ranging between max 51.4°F (10.8°C) and min 31.1°F (-0.5°C). In Plains, the average high-temperature in October declines considerably, from an enjoyable 67.3°F (19.6°C) in September, to a fresh 51.4°F (10.8°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a wintry month in Plains, Montana, with average temperature fluctuating between 23.9°F (-4.5°C) and 37.9°F (3.3°C). In November, the average high-temperature drops, from a cool 51.4°F (10.8°C) in October, to a cold 37.9°F (3.3°C). Weather in November »

Weather in December

December, the first month of the winter, in Plains, is also a subzero cold month, with average temperature fluctuating between 28.9°F (-1.7°C) and 16.2°F (-8.8°C). The coldest month is December, with an average high-temperature of 28.9°F (-1.7°C) and an average low-temperature of 16.2°F (-8.8°C). Weather in December »
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FAQ

What is the most humid month in Plains?

With an average relative humidity of 93%, January is the most humid month.

How much does it rain in Plains?

In Plains, during the entire year, the rain falls for 152.1 days and collects up to 22.09" (561mm) of precipitation.

What is the rainiest month in Plains?

The month with the most rainfall is January when the rain falls for 13.3 days and typically aggregates up to 3.11" (79mm) of precipitation.

When does it snow in Plains?

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

How much does it snow in Plains?

In Plains, during the entire year, snow falls for 90.2 days, and aggregates up to 58.15" (1477mm) of snow.

What is the month with the least sunshine in Plains?

With an average of 3.5h of sunshine, January has the least sunshine of the year in Plains, Montana.

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

Months with the lowest UV index in Plains are January, February, November and December, with an average maximum UV index of 1.

What is the snowiest month in Plains?

February is the month with the most snowfall. Snow falls for 17.9 days and accumulates 15.12" (384mm) of snow.

When it does not snow in Plains?

In Plains snow does not fall in June through August.

When are the longest days in Plains?

The month with the longest days is June, with an average of 15.9h of daylight.

What are the warmest months in Plains?

July and August, with an average high-temperature of 78.8°F (26°C), are warmest months in Plains, Montana.

What are the least humid months in Plains?

July and August, with an average relative humidity of 53%, are the least humid months.

What month has the most sunshine in Plains?

With an average of 11.8h of sunshine, July has the most sunshine of the year in Plains.

When is the highest UV index in Plains?

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

What is the driest month in Plains?

The month with the least rainfall is August when the rain falls for 5.9 days and typically collects 0.39" (10mm) of precipitation.

What is the coldest month in Plains?

The coldest month is December, with an average high-temperature of 28.9°F (-1.7°C) and an average low-temperature of 16.2°F (-8.8°C).

What is the month with the shortest days in Plains?

With an average of 8.5h of daylight, December has the shortest days of the year.

Average temperature
Plains, MT

Average temperature - Plains, MT

The warmest months (with the highest average high temperature) are July and August (78.8°F).
The month with the lowest average high temperature is December (28.9°F).

The month with the highest average low temperature is August (45.7°F).
The coldest month (with the lowest average low temperature) is December (16.2°F).

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Average pressure
Plains, MT

Average pressure - Plains, MT

The month with the highest atmospheric pressure is January (30.19").
The month with the lowest atmospheric pressure is June (29.93").

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Average wind speed
Plains, MT

Average wind speed - Plains, MT

The windiest month (with the highest average wind speed) is April (4.9mph).
The calmest month (with the lowest average wind speed) is December (4mph).

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Average humidity
Plains, MT

Average humidity - Plains, MT

The month with the highest relative humidity is January (93%).
Months with the lowest relative humidity are July and August (53%).

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Average rainfall
Plains, MT

Average rainfall - Plains, MT

The wettest month (with the highest rainfall) is January (3.11").
The driest month (with the least rainfall) is August (0.39").

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Average rainfall days
Plains, MT

Average rainfall days - Plains, MT

The month with the highest number of rainy days is March (19.9 days).
The month with the least rainy days is August (5.9 days).

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Average snowfall
Plains, MT

Average snowfall - Plains, MT

The month with the highest snowfall is February (15.12").
Months with the least snowfall are June, July and August (0").

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Average snowfall days
Plains, MT

Average snowfall days - Plains, MT

The month with the highest number of snowfall days is December (20.4 days).
Months with the least snowfall days are June, July and August (0 days).

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Average daylight / Average sunshine
Plains, MT

Average daylight / Average sunshine - Plains, MT

The month with the longest days is June (Average daylight: 15.9h).
The month with the shortest days is December (Average daylight: 8.5h).

The month with the most sunshine is July (Average sunshine: 11.8h).
The month with the least sunshine is January (Average sunshine: 3.5h).

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Average sunshine days
Plains, MT

Average sunshine days - Plains, MT

Months with the most sunshine days are July and August (23.3 days).
The month with the least sunshine days is March (5.8 days).

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Average visibility
Plains, MT

Average visibility - Plains, MT

Months with the highest visibility are June, July, August and September (6mi).
Months with the lowest visibility are January, February and December (3mi).

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