Big Sky
Montana, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Big Sky, MT

A beautiful view of the scenery in Big Sky, Montana, vast fields, and planted forests near the scenic mountainous region, scattered clouds above
A beautiful view of the scenery in Big Sky, Montana, vast fields, and planted forests near the scenic mountainous region, scattered clouds above
January, the same as December, in Big Sky, Montana, is another subzero cold winter month, with average temperature varying between 25°F (-3.9°C) and 32°F (0°C). In January, the average high-temperature is practically the same as in December - a still freezing cold 25°F (-3.9°C). Weather in January »

February, the last month of the winter, in Big Sky, is also a subzero cold month, with temperature in the range of an average low of 32°F (0°C) and an average high of 25.2°F (-3.8°C). In February, the average high-temperature is essentially the same as in January - a still subzero cold 25.2°F (-3.8°C). Weather in February »

The first month of the spring, March, is a wintry month in Big Sky, Montana, with average temperature varying between 32.9°F (0.5°C) and 32°F (0°C). In March, the average high-temperature slightly increases, from a subzero cold 25.2°F (-3.8°C) in February, to a cold 32.9°F (0.5°C). Weather in March »

April, like March, in Big Sky, Montana, is another cold spring month, with average temperature varying between 32°F (0°C) and 40.1°F (4.5°C). In April, the average high-temperature slightly increases, from 32.9°F (0.5°C) in March, to a still wintry 40.1°F (4.5°C). Weather in April »

May, the last month of the spring, in Big Sky, is a fresh month, with average temperature fluctuating between 52°F (11.1°C) and 32°F (0°C). In May, the average high-temperature increases, from a cold 40.1°F (4.5°C) in April, to a cool 52°F (11.1°C). Weather in May »

June, the first month of the summer, in Big Sky, is a comfortable month, with average temperature varying between 32°F (0°C) and 64°F (17.8°C). In Big Sky, the average high-temperature in June increases, from a cool 52°F (11.1°C) in May, to an enjoyable 64°F (17.8°C). Weather in June »

July is a warm summer month in Big Sky, Montana, with average temperature varying between 74.8°F (23.8°C) and 32°F (0°C). With an average high-temperature of 74.8°F (23.8°C) and an average low-temperature of 32°F (0°C), July is the warmest month. Weather in July »

August, the last month of the summer, in Big Sky, is also an agreeable month, with temperature in the range of an average low of 32°F (0°C) and an average high of 72.7°F (22.6°C). In August, the average high-temperature is relatively the same as in July - an agreeable 72.7°F (22.6°C). Weather in August »

The first month of the autumn, September, is also an enjoyable month in Big Sky, Montana, with average temperature varying between 63.5°F (17.5°C) and 32°F (0°C). In September, the average high-temperature drops, from a pleasant 72.7°F (22.6°C) in August, to a comfortable 63.5°F (17.5°C). Weather in September »

October, like September, is a frosty autumn month in Big Sky, Montana, with temperature in the range of an average low of 32°F (0°C) and an average high of 45.5°F (7.5°C). In Big Sky, Montana, the average high-temperature in October plummets, from an enjoyable 63.5°F (17.5°C) in September, to a chilly 45.5°F (7.5°C). Weather in October »

The last month of the autumn, November, is another cold month in Big Sky, Montana, with average temperature fluctuating between 32.2°F (0.1°C) and 32°F (0°C). In Big Sky, the average high-temperature decreases, from a chilly 45.5°F (7.5°C) in October, to a wintry 32.2°F (0.1°C). Weather in November »

December, the first month of the winter, in Big Sky, is still a freezing cold month, with average temperature varying between 32°F (0°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 32°F (0°C). Weather in December »

What are the most humid months in Big Sky?

January and February, with an average relative humidity of 90%, are most humid months.

How many days does it rain in Big Sky?

In Big Sky, during the entire year, the rain falls for 116.1 days and collects up to 23.5" (597mm) of precipitation.

When does it snow in Big Sky?

Months with snowfall in Big Sky, Montana, 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?

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

What is the month with the lowest UV index in Big Sky?

Months with the lowest UV index in Big Sky, Montana, are January and February, with an average maximum UV index of 1.

What is the wettest month in Big Sky?

Months with the most rainfall are April and May, with an average 2.91" (74mm) of precipitation.

When does it snow the most in Big Sky?

April is the month with the most snowfall. 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 is June, with an average of 15.6h of daylight.

What 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 32°F (0°C), July is the warmest month in Big Sky.

What is the driest month in Big Sky?

July is the month with the least rainfall. Rain falls for 12.5 days and accumulates 1.18" (30mm) of precipitation.

What month has the most sunshine in Big Sky?

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

What is the month with the highest UV index in Big Sky?

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

What is the least humid month in Big Sky?

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

When it does not snow in Big Sky?

August is the month with the least snowfall in Big Sky, Montana. Snow falls for 0.3 days and accumulates 0.08" (2mm) of snow.

What is the coldest month in Big Sky?

December 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 32°F (0°C).

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

December has the shortest days of the year in Big Sky, with an average of 8.8h of daylight.
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).

Months with the highest average low temperature are January, February, March, April, May, June, July, August, September, October, November and December (0°F).
Coldest months (with the lowest average low temperature) are January, February, March, April, May, June, July, August, September, October, November and December (0°F).

Average humidity - Big Sky, MT
Average rainfall - Big Sky, MT

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

Average rainfall days - Big Sky, MT

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

Average snowfall - 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 lowest number of snowfall days is August (0.3 days).

Average daylight / Average sunshine - Big Sky, MT