West Yellowstone
Montana, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
West Yellowstone, MT

January, the same as December, in West Yellowstone, Montana, is a freezing cold winter month, with average temperature fluctuating between 32°F (0°C) and 21.9°F (-5.6°C). In January, the average high-temperature is relatively the same as in December - a still freezing cold 21.9°F (-5.6°C). Weather in January »

The last month of the winter, February, is another freezing cold month in West Yellowstone, Montana, with average temperature varying between 23°F (-5°C) and 32°F (0°C). In February, the average high-temperature is practically the same as in January - a still subzero cold 23°F (-5°C). Weather in February »

March, the first month of the spring, in West Yellowstone, is also a subzero cold month, with average temperature fluctuating between 32°F (0°C) and 30°F (-1.1°C). In March, the average high-temperature slightly increases, from a subzero cold 23°F (-5°C) in February, to a still freezing cold 30°F (-1.1°C). Weather in March »

April in West Yellowstone, Montana, is a wintry spring month, with average temperature varying between 32°F (0°C) and 37.2°F (2.9°C). In April, the average high-temperature slightly increases, from a subzero cold 30°F (-1.1°C) in March, to a cold 37.2°F (2.9°C). Weather in April »

The last month of the spring, May, is a chilly month in West Yellowstone, Montana, with average temperature fluctuating between 32°F (0°C) and 49.8°F (9.9°C). In West Yellowstone, the average high-temperature increases, from a cold 37.2°F (2.9°C) in April, to a chilly 49.8°F (9.9°C). Weather in May »

June, the first month of the summer, in West Yellowstone, is an enjoyable month, with temperature in the range of an average high of 61.9°F (16.6°C) and an average low of 32°F (0°C). In West Yellowstone, the average high-temperature rises, from a frosty 49.8°F (9.9°C) in May, to an enjoyable 61.9°F (16.6°C). Weather in June »

July in West Yellowstone, Montana, is a pleasant summer month, with average temperature fluctuating between 72.9°F (22.7°C) and 32°F (0°C). With an average high-temperature of 72.9°F (22.7°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 West Yellowstone, is another pleasant month, with temperature in the range of an average high of 71.4°F (21.9°C) and an average low of 32°F (0°C). In August, the average high-temperature is almost the same as in July - a still pleasant 71.4°F (21.9°C). Weather in August »

The first month of the autumn, September, is still a comfortable month in West Yellowstone, Montana, with average temperature varying between 61.9°F (16.6°C) and 32°F (0°C). In September, the average high-temperature decreases, from a pleasant 71.4°F (21.9°C) in August, to an enjoyable 61.9°F (16.6°C). Weather in September »

October, the same as September, in West Yellowstone, Montana, is a frosty autumn month, with temperature in the range of an average low of 32°F (0°C) and an average high of 44.2°F (6.8°C). In West Yellowstone, the average high-temperature declines considerably, from a comfortable 61.9°F (16.6°C) in September, to a chilly 44.2°F (6.8°C). Weather in October »

The last month of the autumn, November, is also a subzero cold month in West Yellowstone, Montana, with average temperature fluctuating between 32°F (0°C) and 29.7°F (-1.3°C). In West Yellowstone, the average high-temperature in November declines considerably, from a frosty 44.2°F (6.8°C) in October, to a subzero cold 29.7°F (-1.3°C). Weather in November »

December, the first month of the winter, in West Yellowstone, is also a subzero cold month, with average temperature ranging between min 32°F (0°C) and max 20.1°F (-6.6°C). With an average high-temperature of 20.1°F (-6.6°C) and an average low-temperature of 32°F (0°C), December is the coldest month. Weather in December »

How much does it rain in West Yellowstone?

Throughout the year, in West Yellowstone, there are 109.2 rainfall days, and 23.15" (588mm) of precipitation is accumulated.

When does it snow in West Yellowstone?

January through July, September through December are months with snowfall in West Yellowstone.

How much does it snow in West Yellowstone?

In West Yellowstone, Montana, during the entire year, snow falls for 159.3 days, and aggregates up to 120.47" (3060mm) of snow.

What is the month with the least sunshine in West Yellowstone?

January, February and December, with an average of 3.3h of sunshine, are months with the least sunshine in West Yellowstone.

When is the lowest UV index in West Yellowstone?

January through April, October through December, with an average maximum UV index of 1, are months with the lowest UV index.

What is the most humid month in West Yellowstone?

The most humid month in West Yellowstone is February, with an average relative humidity of 95%.

When does it snow the most in West Yellowstone?

February is the month with the most snowfall in West Yellowstone. Snow falls for 23.2 days and accumulates 17.83" (453mm) of snow.

What is the rainiest month in West Yellowstone?

The month with the most rainfall in West Yellowstone is May when the rain falls for 17.4 days and typically aggregates up to 2.8" (71mm) of precipitation.

When are the longest days in West Yellowstone?

The month with the longest days is June, with an average of 15.5h of daylight.

What is the warmest month in West Yellowstone?

The warmest month is July, with an average high-temperature of 72.9°F (22.7°C) and an average low-temperature of 32°F (0°C).

What is the driest month in West Yellowstone?

July is the month with the least rainfall in West Yellowstone. Rain falls for 11.9 days and accumulates 0.91" (23mm) of precipitation.

What month has the most sunshine in West Yellowstone?

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

When is the highest UV index in West Yellowstone?

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

What is the least humid month in West Yellowstone?

With an average relative humidity of 50%, August is the least humid month in West Yellowstone.

When it does not snow in West Yellowstone?

The only month without snowfall in West Yellowstone, Montana, is August.

What is the coldest month in West Yellowstone?

The coldest month is December, with an average high-temperature of 20.1°F (-6.6°C) and an average low-temperature of 32°F (0°C).

What is the month with the shortest days in West Yellowstone?

December has the shortest days of the year, with an average of 8.9h of daylight.
Average temperature - West Yellowstone, MT

The warmest month (with the highest average high temperature) is July (72.9°F).
The month with the lowest average high temperature is December (20.1°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 - West Yellowstone, MT
Average rainfall - West Yellowstone, MT
Average rainfall days - West Yellowstone, MT

The month with the highest number of rainy days is May (17.4 days).
The month with the lowest number of rainy days is January (2.2 days).

Average snowfall - West Yellowstone, MT
Average snowfall days - West Yellowstone, MT

The month with the highest number of snowfall days is March (24.4 days).
Months with the lowest number of snowfall days are July and August (0.2 days).

Average daylight / Average sunshine - West Yellowstone, MT

The month with the longest days is June (Average daylight: 15.5h).
The month with shortest days is December (Average daylight: 8.9h).

The month with most sunshine is July (Average sunshine: 11.8h).
Months with least sunshine are January, February and December (Average sunshine: 3.3).

Average UV index - West Yellowstone, MT