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

Monthly weather forecast and climate
Big Sky, MT

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

The last month of the winter, February, is also a subzero cold month in Big Sky, Montana, with average temperature varying between 9.5°F (-12.5°C) and 25.2°F (-3.8°C). In Big Sky, the average high-temperature in February is practically the same as in January - a still freezing cold 25.2°F (-3.8°C). Weather in February »

March, the first month of the spring, in Big Sky, is a cold month, with average temperature ranging between min 17.6°F (-8°C) and max 32.9°F (0.5°C). In Big Sky, 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, the same as March, is another cold spring month in Big Sky, Montana, with average temperature ranging between min 22.1°F (-5.5°C) and max 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 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 rises, from a cold 40.1°F (4.5°C) in April, to a fresh 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 fluctuating between 64°F (17.8°C) and 38.5°F (3.6°C). In Big Sky, the average high-temperature 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 moderately hot summer month in Big Sky, Montana, with average temperature fluctuating between 44.6°F (7°C) and 74.8°F (23.8°C). The warmest month is July, with an average high-temperature of 74.8°F (23.8°C) and an average low-temperature of 44.6°F (7°C). Weather in July »

August, the last month of the summer, in Big Sky, is also an agreeable month, with average temperature ranging between min 45.1°F (7.3°C) and max 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 fluctuating between 63.5°F (17.5°C) and 39.6°F (4.2°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 average temperature fluctuating between 45.5°F (7.5°C) and 27.5°F (-2.5°C). In Big Sky, the average high-temperature declines considerably, from a comfortable 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 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 »

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

What is the most humid month 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?

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

When does it snow in Big Sky?

January through December are months with snowfall.

How many days does it snow in Big Sky?

Throughout the year, there are 151.6 snowfall days, and 124.06" (3151mm) of snow is accumulated.

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.

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 rainiest month in Big Sky?

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

What is the snowiest month 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?

With an average of 15.6h of daylight, June has the longest days of the year.

What is the warmest month in Big Sky?

The warmest month is July, 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?

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?

The month with the highest UV index in Big Sky is July, 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.

When it does not snow in Big Sky?

The month with the least snowfall in Big Sky 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?

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

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

December has the shortest days of the year, with an average of 8.8h of daylight.
Average temperature - Big Sky, MT
Average humidity - Big Sky, MT
Average rainfall - 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).

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).

Average daylight / Average sunshine - Big Sky, MT

The month with the longest days is June (Average daylight: 15.6h).
The month with the shortest days is December (Average daylight: 8.8h).

The month with the most sunshine is July (Average sunshine: 11.7h).
The month with the least sunshine is January (Average sunshine: 4.7h).