Yellowstone National Park
Wyoming, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Yellowstone National Park, WY

Stunning view of the natural Grand Prismatic hot springs within Yellowstone National Park, Wyoming, with yellow trails and trees and mountains in the background
Stunning view of the natural Grand Prismatic hot springs within Yellowstone National Park, Wyoming, with yellow trails and trees and mountains in the background
January, the same as December, in Yellowstone National Park, Wyoming, is another subzero cold winter month, with temperature in the range of an average low of 32°F (0°C) and an average high of 24.4°F (-4.2°C). In Yellowstone National Park, the average high-temperature is practically the same as in December - a still freezing cold 24.4°F (-4.2°C). Weather in January »

The last month of the winter, February, is also a subzero cold month in Yellowstone National Park, Wyoming, with average temperature varying between 32°F (0°C) and 28°F (-2.2°C). In February, the average high-temperature is essentially the same as in January - a still freezing cold 28°F (-2.2°C). Weather in February »

March, the first month of the spring, in Yellowstone National Park, is a cold month, with temperature in the range of an average high of 36.1°F (2.3°C) and an average low of 32°F (0°C). In Yellowstone National Park, the average high-temperature marginally rises, from a subzero cold 28°F (-2.2°C) in February, to a wintry 36.1°F (2.3°C). Weather in March »

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 32°F (0°C). In Yellowstone National Park, the average high-temperature in April marginally rises, from a wintry 36.1°F (2.3°C) in March, to a frosty 43.3°F (6.3°C). Weather in April »

The last month of the spring, May, is a cool month in Yellowstone National Park, Wyoming, with temperature in the range of an average low of 32°F (0°C) and an average high of 52°F (11.1°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 »

June, the first month of the summer, in Yellowstone National Park, is a comfortable month, with temperature in the range of an average low of 32°F (0°C) and an average high of 61.5°F (16.4°C). In Yellowstone National Park, the average high-temperature in June increases, from a fresh 52°F (11.1°C) in May, to an enjoyable 61.5°F (16.4°C). Weather in June »

July in Yellowstone National Park, Wyoming, is a pleasant summer month, with average temperature ranging between min 32°F (0°C) and max 71.6°F (22°C). The warmest month is July, with an average high-temperature of 71.6°F (22°C) and an average low-temperature of 32°F (0°C). Weather in July »

August, the last month of the summer, in Yellowstone National Park, is also an agreeable month, with average temperature fluctuating between 32°F (0°C) and 71.4°F (21.9°C). In August, the average high-temperature is practically the same as in July - a still agreeable 71.4°F (21.9°C). Weather in August »

September, the first month of the autumn, in Yellowstone National Park, is still a comfortable month, with average temperature varying between 61.5°F (16.4°C) and 32°F (0°C). In Yellowstone National Park, the average high-temperature drops, from a pleasant 71.4°F (21.9°C) in August, to a comfortable 61.5°F (16.4°C). Weather in September »

October, like September, is a frosty autumn month in Yellowstone National Park, Wyoming, with average temperature varying between 32°F (0°C) and 47.8°F (8.8°C). In October, the average high-temperature decreases, from an enjoyable 61.5°F (16.4°C) in September, to a chilly 47.8°F (8.8°C). Weather in October »

November, the last month of the autumn, in Yellowstone National Park, is another cold month, with average temperature fluctuating between 32°F (0°C) and 33.4°F (0.8°C). In Yellowstone National Park, the average high-temperature in November significantly decreases, from a frosty 47.8°F (8.8°C) in October, to a wintry 33.4°F (0.8°C). Weather in November »

December, the first month of the winter, in Yellowstone National Park, is still a freezing cold month, with average temperature varying between 32°F (0°C) and 24.3°F (-4.3°C). December is the coldest month, with an average high-temperature of 24.3°F (-4.3°C) and an average low-temperature of 32°F (0°C). Weather in December »

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.

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.

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.

What are the months with the lowest UV index in Yellowstone National Park?

Months with the lowest UV index are January and December, with an average maximum UV index of 1.

What is the wettest month in Yellowstone National Park?

The month with the most rainfall in Yellowstone National Park, Wyoming, is May when the rain falls for 11.5 days and typically aggregates up to 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 32°F (0°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?

July has the most sunshine of the year, with an average of 11h of sunshine.

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

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

What is the driest month in Yellowstone National Park?

October is the month with the least rainfall in Yellowstone National Park, Wyoming. Rain falls for 8.8 days and accumulates 1.18" (30mm) of precipitation.

What is the coldest month in Yellowstone National Park?

With an average high-temperature of 24.3°F (-4.3°C) and an average low-temperature of 32°F (0°C), December is the coldest month in Yellowstone National Park.

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

December has the shortest days of the year, with an average of 8.9h of daylight.

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

The month with the least sunshine is December, with an average of 4h of sunshine.
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).

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 rainfall - 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 lowest number of rainy days is October (8.8 days).

Average snowfall - 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 lowest number of snowfall days are July and August (0 days).

Average daylight / Average sunshine - Yellowstone National Park, WY