Climate and monthly weather forecast
Yellowstone National Park, WY

The natural Grand Prismatic hot springs within Yellowstone National Park, Wyoming, with yellow trails and trees and mountains in the background
The natural Grand Prismatic hot springs within Yellowstone National Park, Wyoming, with yellow trails and trees and mountains in the background

Weather in January

January, the same as December, in Yellowstone National Park, Wyoming, is another subzero cold winter month, with temperature in the range of an average high of 24.4°F (-4.2°C) and an average low of 1.2°F (-17.1°C). In Yellowstone National Park, Wyoming, the average high-temperature in January is practically the same as in December - a still freezing cold 24.4°F (-4.2°C). Weather in January »

Weather in February

The last month of the winter, February, is another freezing cold month in Yellowstone National Park, Wyoming, with temperature in the range of an average high of 28°F (-2.2°C) and an average low of 1.2°F (-17.1°C). In February, the average high-temperature is essentially the same as in January - a still subzero cold 28°F (-2.2°C). Weather in February »

Weather in March

The first month of the spring, March, is a wintry month in Yellowstone National Park, Wyoming, with average temperature fluctuating between 9.1°F (-12.7°C) and 36.1°F (2.3°C). In March, the average high-temperature slightly increases, from a freezing cold 28°F (-2.2°C) in February, to a wintry 36.1°F (2.3°C). Weather in March »

Weather in April

April in Yellowstone National Park, Wyoming, is a chilly spring month, with average temperature ranging between max 43.3°F (6.3°C) and min 18°F (-7.8°C). In April, the average high-temperature marginally rises, from a wintry 36.1°F (2.3°C) in March, to a chilly 43.3°F (6.3°C). Weather in April »

Weather in May

May, the last month of the spring, in Yellowstone National Park, is a fresh month, with temperature in the range of an average high of 52°F (11.1°C) and an average low of 28°F (-2.2°C). In May, the average high-temperature slightly increases, from a chilly 43.3°F (6.3°C) in April, to a cool 52°F (11.1°C). Weather in May »

Weather in June

The first month of the summer, June, is an enjoyable month in Yellowstone National Park, Wyoming, with average temperature varying between 35.4°F (1.9°C) and 61.5°F (16.4°C). In June, the average high-temperature increases, from a cool 52°F (11.1°C) in May, to a comfortable 61.5°F (16.4°C). Weather in June »

Weather in July

July in Yellowstone National Park, Wyoming, is an agreeable summer month, with temperature in the range of an average high of 71.6°F (22°C) and an average low of 41.5°F (5.3°C). With an average high-temperature of 71.6°F (22°C) and an average low-temperature of 41.5°F (5.3°C), July is the warmest month. Weather in July »

Weather in August

August, the last month of the summer, in Yellowstone National Park, is also an agreeable month, with average temperature varying between 39.9°F (4.4°C) and 71.4°F (21.9°C). In Yellowstone National Park, Wyoming, the average high-temperature in August is essentially the same as in July - a still agreeable 71.4°F (21.9°C). Weather in August »

Weather in September

September, the first month of the autumn, in Yellowstone National Park, is also an enjoyable month, with temperature in the range of an average low of 31.8°F (-0.1°C) and an average high of 61.5°F (16.4°C). In September, the average high-temperature decreases, from an agreeable 71.4°F (21.9°C) in August, to an enjoyable 61.5°F (16.4°C). Weather in September »

Weather in October

October, the same as September, in Yellowstone National Park, Wyoming, is a frosty autumn month, with average temperature fluctuating between 23.7°F (-4.6°C) and 47.8°F (8.8°C). In Yellowstone National Park, Wyoming, the average high-temperature decreases, from an enjoyable 61.5°F (16.4°C) in September, to a frosty 47.8°F (8.8°C). Weather in October »

Weather in November

November, the last month of the autumn, in Yellowstone National Park, is also a wintry month, with average temperature ranging between min 13.8°F (-10.1°C) and max 33.4°F (0.8°C). In Yellowstone National Park, the average high-temperature significantly decreases, from a frosty 47.8°F (8.8°C) in October, to a cold 33.4°F (0.8°C). Weather in November »

Weather in December

The first month of the winter, December, is still a freezing cold month in Yellowstone National Park, Wyoming, with average temperature varying between 5°F (-15°C) and 24.3°F (-4.3°C). With an average high-temperature of 24.3°F (-4.3°C) and an average low-temperature of 5°F (-15°C), December is the coldest month. Weather in December »
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FAQ

How much does it rain in Yellowstone National Park?

Throughout the year, in Yellowstone National Park, Wyoming, there are 151 rainfall days, and 20.9" (530.8mm) of precipitation is accumulated.

When does it snow in Yellowstone National Park?

Months with snowfall are January through June, September through December.

When does it snow the most in Yellowstone National Park?

January is the month with the most snowfall. Snow falls for 16.2 days and accumulates 34.3" (871.2mm) of snow.

How many days does it snow in Yellowstone National Park?

In Yellowstone National Park, Wyoming, during the entire year, snow falls for 91.4 days, and aggregates up to 193.7" (4920mm) of snow.

What is the month with the lowest UV index in Yellowstone National Park?

January and December, with an average maximum UV index of 1, are months with the lowest UV index in Yellowstone National Park, Wyoming.

What is the rainiest month in Yellowstone National Park?

May is the month with the most rainfall in Yellowstone National Park. Rain falls for 11.5 days and accumulates 2.47" (62.7mm) of precipitation.

When are the longest days in Yellowstone National Park?

With an average of 15.5h of daylight, June has the longest days of the year.

What is the warmest month in Yellowstone National Park?

July is the warmest month, with an average high-temperature of 71.6°F (22°C) and an average low-temperature of 41.5°F (5.3°C).

When it does not snow in Yellowstone National Park?

In Yellowstone National Park, Wyoming, snow does not fall in July and August.

What month has the most sunshine in Yellowstone National Park?

With an average of 11h of sunshine, July has the most sunshine of the year in Yellowstone National Park, Wyoming.

When is the highest UV index in Yellowstone National Park?

The month with the highest UV index is July, with an average maximum UV index of 10.

What is the driest month in Yellowstone National Park?

October is the month with the least rainfall. Rain falls for 8.8 days and accumulates 1.18" (30mm) of precipitation.

What is the coldest month in Yellowstone National Park?

December is the coldest month, with an average high-temperature of 24.3°F (-4.3°C) and an average low-temperature of 5°F (-15°C).

What is the month with the shortest days in Yellowstone National Park?

With an average of 8.9h of daylight, December has the shortest days of the year in Yellowstone National Park, Wyoming.

What is the month with the least sunshine in Yellowstone National Park?

The month with the least sunshine in Yellowstone National Park is December, with an average of 4h of sunshine.

Average temperature
Yellowstone National Park, WY

Average temperature - Yellowstone National Park, WY

The warmest month (with the highest average high temperature) is July (71.6°F).
The month with the lowest average high temperature is December (24.3°F).

The month with the highest average low temperature is July (41.6°F).
The coldest months (with the lowest average low temperature) are January and February (1.2°F).

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Average rainfall
Yellowstone National Park, WY

Average rainfall - Yellowstone National Park, WY

The wettest month (with the highest rainfall) is May (2.5").
The driest month (with the least rainfall) is October (1.2").

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Average rainfall days
Yellowstone National Park, WY

Average rainfall days - Yellowstone National Park, WY

The month with the highest number of rainy days is January (16.8 days).
The month with the least rainy days is October (8.8 days).

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Average snowfall
Yellowstone National Park, WY

Average snowfall - Yellowstone National Park, WY

The month with the highest snowfall is January (34.3").
Months with the least snowfall are July and August (0").

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Average snowfall days
Yellowstone National Park, WY

Average snowfall days - Yellowstone National Park, WY

The month with the highest number of snowfall days is January (16.2 days).
Months with the least snowfall days are July and August (0 days).

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Average daylight / Average sunshine
Yellowstone National Park, WY

Average daylight / Average sunshine - Yellowstone National Park, WY

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

The month with the most sunshine is July (Average sunshine: 11h).
The month with the least sunshine is December (Average sunshine: 4h).

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