Climate and monthly weather forecast
Big Sky, MT

Vast fields and planted forests near the scenic mountainous region in Big Sky, Montana
Vast fields and planted forests near the scenic mountainous region in Big Sky, Montana

Weather in January

January, the same as December, in Big Sky, Montana, is a freezing cold winter month, with an average temperature ranging between min 9.9°F (-12.3°C) and max 25°F (-3.9°C). In Big Sky, the average high-temperature in January is almost the same as in December - a still subzero cold 25°F (-3.9°C). Weather in January »

Weather in February

The last month of the winter, February, is another freezing cold month in Big Sky, Montana, with temperature in the range of an average low of 9.5°F (-12.5°C) and an average high of 25.2°F (-3.8°C). In February, the average high-temperature is almost the same as in January - a still freezing cold 25.2°F (-3.8°C). Weather in February »

Weather in March

March, the first month of the spring in Big Sky, is a cold month, with an average temperature fluctuating between 17.6°F (-8°C) and 32.9°F (0.5°C). In March, the average high-temperature marginally rises from a freezing cold 25.2°F (-3.8°C) in February to a wintry 32.9°F (0.5°C). Weather in March »

Weather in April

April, like March, in Big Sky, Montana, is another cold spring month, with an average temperature ranging between max 40.1°F (4.5°C) and min 22.1°F (-5.5°C). In April, the average high-temperature slightly increases from a cold 32.9°F (0.5°C) in March to a still wintry 40.1°F (4.5°C). Weather in April »

Weather in May

May, the last month of the spring in Big Sky, is a cool month, with temperature in the range of an average low of 30.6°F (-0.8°C) and an average high of 52°F (11.1°C). In Big Sky, the average high-temperature in May increases from a cold 40.1°F (4.5°C) in April to a fresh 52°F (11.1°C). Weather in May »

Weather in June

The first month of the summer, June, is an enjoyable month in Big Sky, Montana, with an average temperature fluctuating between 64°F (17.8°C) and 38.5°F (3.6°C). In Big Sky, Montana, the average high-temperature in June rises from a cool 52°F (11.1°C) in May to a comfortable 64°F (17.8°C). Weather in June »

Weather in July

July is a warm summer month in Big Sky, Montana, with an average temperature ranging between min 44.6°F (7°C) and max 74.8°F (23.8°C). With an average high-temperature of 74.8°F (23.8°C) and an average low-temperature of 44.6°F (7°C), July is the warmest month. Weather in July »

Weather in August

August, the last month of the summer in Big Sky, is also an agreeable month, with an average temperature fluctuating between 72.7°F (22.6°C) and 45.1°F (7.3°C). In Big Sky, the average high-temperature in August is almost the same as in July - an agreeable 72.7°F (22.6°C). Weather in August »

Weather in September

September, the first month of the autumn in Big Sky, is also an enjoyable month, with temperature in the range of an average high of 63.5°F (17.5°C) and an average low of 39.6°F (4.2°C). In Big Sky, the average high-temperature in September decreases from an agreeable 72.7°F (22.6°C) in August to an enjoyable 63.5°F (17.5°C). Weather in September »

Weather in October

October, the same as September, in Big Sky, Montana, is a frosty autumn month, with temperature in the range of an average high of 45.5°F (7.5°C) and an average low of 27.5°F (-2.5°C). In Big Sky, the average high-temperature in October significantly decreases from a comfortable 63.5°F (17.5°C) in September to a frosty 45.5°F (7.5°C). Weather in October »

Weather in November

November, the last month of the autumn in Big Sky, is also a wintry month, with temperature in the range of an average low of 16.9°F (-8.4°C) and an average high of 32.2°F (0.1°C). In November, the average high-temperature decreases from a frosty 45.5°F (7.5°C) in October to a wintry 32.2°F (0.1°C). Weather in November »

Weather in December

December, the first month of the winter in Big Sky, is also a subzero cold month, with an average temperature varying between 7.9°F (-13.4°C) and 22.5°F (-5.3°C). The coldest month is December, with an average high-temperature of 22.5°F (-5.3°C) and an average low-temperature of 7.9°F (-13.4°C). Weather in December »
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FAQ

What is the most humid month in Big Sky?

The months with the highest humidity are January and February, with an average relative humidity of 90%.

How many days does it rain in Big Sky?

Throughout the year, there are 116.1 rainfall days, and 23.5" (597mm) of precipitation is accumulated.

When does it snow in Big Sky?

Months with snowfall are January through December.

How much does it snow in Big Sky?

In Big Sky, during the entire year, snow falls for 151.6 days and aggregates up to 124.06" (3151mm) of snow.

What is the month with the least sunshine in Big Sky?

With an average of 4.7h of sunshine, January has the least sunshine of the year in Big Sky.

What are the months with the lowest UV index in Big Sky?

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

When is Daylight Saving Time (DST) in Big Sky?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts in Big Sky, 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.

What is the wettest month in Big Sky?

The wettest months in Big Sky, Montana, are April and May, with an average 2.91" (74mm) of rainfall.

When does it snow the most in Big Sky?

April is the month with the most snowfall in Big Sky, Montana. Snow falls for 20.5 days and accumulates 19.88" (505mm) of snow.

When are the longest days in Big Sky?

The month with the longest days in Big Sky, Montana, is June, with an average of 15h and 35min of daylight.

What is the warmest month in Big Sky?

July is the warmest month in Big Sky, with an average high-temperature of 74.8°F (23.8°C) and an average low-temperature of 44.6°F (7°C).

What is the driest month in Big Sky?

The month with the least rainfall is July, when the rain falls for 12.5 days and typically collects 1.18" (30mm) of precipitation.

What month has the most sunshine in Big Sky?

With an average of 11.7h of sunshine, July has the most sunshine of the year in Big Sky.

When is the highest UV index in Big Sky?

July is the month with the highest UV index in Big Sky, with an average maximum UV index of 5.

What is the least humid month in Big Sky?

With an average relative humidity of 51%, August is the least humid month in Big Sky, Montana.

When it does not snow in Big Sky?

The month with the least snowfall is August, when snow falls for 0.3 days and typically aggregates up to 0.08" (2mm) of snow.

What is the coldest month in Big Sky?

With an average high-temperature of 22.5°F (-5.3°C) and an average low-temperature of 7.9°F (-13.4°C), December is the coldest month in Big Sky, Montana.

What is the month with the shortest days in Big Sky?

With an average of 8h and 49min of daylight, December has the shortest days of the year in Big Sky.

Average temperature
Big Sky, MT

Average temperature - Big Sky, MT

The warmest month (with the highest average high temperature) is July (74.8°F).
The month with the lowest average high temperature is December (22.5°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 (7.9°F).

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Average pressure
Big Sky, MT

Average pressure - Big Sky, MT

The month with the highest atmospheric pressure is January (30.22"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed
Big Sky, MT

Average wind speed - Big Sky, MT

The windiest month (with the highest average wind speed) is January (7.1mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

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Average humidity
Big Sky, MT

Average humidity - Big Sky, MT

The months with the highest relative humidity are January and February (90%).
The month with the lowest relative humidity is August (51%).

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Average rainfall
Big Sky, MT

Average rainfall - Big Sky, MT

The wettest months (with the highest rainfall) are April and May (2.91").
The driest month (with the least rainfall) is July (1.18").

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Average rainfall days
Big Sky, MT

Average rainfall days - Big Sky, MT

The month with the highest number of rainy days is June (16.6 days).
The month with the least rainy days is February (4.3 days).

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Average snowfall
Big Sky, MT

Average snowfall - Big Sky, MT

The month with the highest snowfall is April (19.88").
The month with the least snowfall is August (0.08").

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Average snowfall days
Big Sky, MT

Average snowfall days - Big Sky, MT

The month with the highest number of snowfall days is March (21 days).
The month with the least snowfall days is August (0.3 days).

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Average daylight / Average sunshine
Big Sky, MT

Average daylight / Average sunshine - Big Sky, MT

The month with the longest days is June (Average daylight: 15h and 35min).
The month with the shortest days is December (Average daylight: 8h and 49min).

The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).

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Average sunshine days
Big Sky, MT

Average sunshine days - Big Sky, MT

The month with the most sunshine days is September (14.5 days).
The month with the least sunshine days is May (5.7 days).

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Average visibility
Big Sky, MT

Average visibility - Big Sky, MT

The months with the highest visibility are June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March, April and December (4mi).

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