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

How many days does it rain in Yellowstone National Park?

Throughout the year, 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 in Yellowstone National Park, Wyoming, are January through June, September through December.

How many days does it snow in Yellowstone National Park?

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

What is the snowiest month in Yellowstone National Park?

The month with the most snowfall in Yellowstone National Park is January when snow falls for 16.2 days and typically aggregates up to 34.3" (871.2mm) of snow.

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

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

What is the wettest month in Yellowstone National Park?

May is the month with the most rainfall in Yellowstone National Park, Wyoming. Rain falls for 11.5 days and accumulates 2.5" (62.7mm) of precipitation.

What is the warmest month in Yellowstone National Park?

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.

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

The month with the highest UV index in Yellowstone National Park, Wyoming, is July, with an average UV index of 10.

What is the driest month in Yellowstone National Park?

October is the month with the least rainfall in Yellowstone National Park. Rain falls for 8.8 days and accumulates 1.2" (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 5°F (-15°C), December is the coldest month in Yellowstone National Park, Wyoming.
Average temperature - Yellowstone National Park, WY
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
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