July weather forecast
Yellowstone National Park, WY

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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 July

July is the warmest month in Yellowstone National Park, with temperatures soaring to a yearly high of 71.6°F (22°C). Despite being mid-summer, rainfall is meager, contributing to the dry, comfortable climate. This period attracts countless tourists given the splendid hiking, camping, and wildlife viewing conditions. Expect to find the park at its liveliest, with flora in full bloom and fauna visible throughout the day. July manifestly showcases the splendor of Yellowstone National Park.

Temperature

July, marked by an average high-temperature of 71.6°F (22°C) and a low-temperature of 41.5°F (5.3°C), is the warmest month in Yellowstone National Park.

Rainfall

In Yellowstone National Park, in July, during 11 rainfall days, 1.61" (41mm) of precipitation is typically accumulated. Throughout the year, in Yellowstone National Park, there are 151 rainfall days, and 20.91" (531mm) of precipitation is accumulated.

Snowfall

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

Daylight

In July, the average length of the day is 15h and 8min.
On the first day of the month, sunrise is at 5:42 am and sunset at 9:10 pm. On the last day of July, sunrise is at 6:09 am and sunset at 8:48 pm MDT.

Sunshine

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

UV index

July is the month with the highest UV index in Yellowstone National Park, Wyoming, with an average maximum UV index of 10. A UV Index estimate of 8 to 10 represents a very high health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: The UV index of 10 during July translates into the following guidance:
Immediate care is essential; skin and eyes can be harmed in no time without it. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. Boost your sun resistance with garments that are densely woven yet spacious.
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Frequently asked questions

What is the warmest month in Yellowstone National Park?

Yellowstone National Park's warmest month, July, registers temperatures that range from a high of 71.6°F (22°C) to a low of 41.5°F (5.3°C).

What are July temperatures in Yellowstone National Park?

The high-temperature, in July, in Yellowstone National Park, is 71.6°F (22°C), while the low-temperature averages to 41.5°F (5.3°C).

How much does it rain in Yellowstone National Park in July?

In Yellowstone National Park, Wyoming, in July, it is raining for 11 days, with typically 1.61" (41mm) of accumulated precipitation.

When it does not snow in Yellowstone National Park?

July and August are months without snowfall in Yellowstone National Park, Wyoming.

Does it snow in Yellowstone National Park in July?

In July, in Yellowstone National Park, it doesn't snow. June is the latest month when it typically snows.

What is the average length of the day in July in Yellowstone National Park?

In Yellowstone National Park, Wyoming, the average day length in July is 15h and 8min.

When are sunrise and sunset in July in Yellowstone National Park?

In July, on the first day of the month, sunrise is at 5:42 am and sunset at 9:10 pm. On the last day of the month, sunrise is at 6:09 am and sunset at 8:48 pm MDT.

What month has the most sunshine in Yellowstone National Park?

The month with the most sunshine is July, with an average of 11h of sunshine.

How many hours of sunshine does Yellowstone National Park have in July?

In July, the average sunshine duration in Yellowstone National Park is 11h.

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 UV index reading in July in Yellowstone National Park?

In July, the average daily maximum UV index is 10. A UV Index estimate of 8 to 10 represents a very high health risk from unprotected exposure to UV radiation.
Today
Tomorrow
Long-term
YearJFMAMJJulyASOND
Jun
July
Aug
Average high temperature
61.6°F 16.4°C
71.6°F 22°C
71.4°F 21.9°C
Average low temperature
35.4°F 1.9°C
41.6°F 5.3°C
39.9°F 4.4°C
Average rainfall
2.3" 58mm
1.6" 41mm
1.6" 41mm
Average rainfall days
14.4
11
10.8
Average snowfall
1.3" 33mm
0" 0mm
0" 0mm
Average snowfall days
0.9
0
0
Average daylight
15h 3min
15h 1min
14h 0min
Average sunshine
10h
11h
10h
Average UV index
9
10
8

Average temperature in July
Yellowstone National Park, WY

Average temperature in July - Yellowstone National Park, WY
  • Average high temperature in July: 71.6°F

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).

  • Average low temperature in July: 41.6°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 in July
Yellowstone National Park, WY

Average rainfall in July - Yellowstone National Park, WY
  • Average rainfall in July: 1.6"

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 in July
Yellowstone National Park, WY

Average rainfall days in July - Yellowstone National Park, WY
  • Average rainfall days in July: 11 days

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 in July
Yellowstone National Park, WY

Average snowfall in July - Yellowstone National Park, WY
  • Average snowfall in July: 0"

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

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Average snowfall days in July
Yellowstone National Park, WY

Average snowfall days in July - Yellowstone National Park, WY
  • Average snowfall days in July: 0 days

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

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Average daylight in July /
Average sunshine in July
Yellowstone National Park, WY

Average daylight in July / Average sunshine in July - Yellowstone National Park, WY
  • Average daylight in July: 15h and 1min

The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).

  • Average sunshine in July: 11h

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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Average UV index in July
Yellowstone National Park, WY

Average UV index in July - Yellowstone National Park, WY
  • Average UV index in July: 10

The month with the highest UV index is July (UV index 10).
The months with the lowest UV index are January and December (UV index 1).

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Yellowstone National Park, Wyoming, USA

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