The temperatures in Yellowstone in August are comfortable with low of 19°C and and high up to 29°C.
You can expect rain for roughly half of the month of August in Yellowstone. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Yellowstone in August 2025.
If you’re planning to visit Yellowstone in the near future, we highly recommend that you review the 14 day weather forecast for Yellowstone before you arrive.
Temperatures
29° / 19°
Rainy Days
8
Snowy Days
0
Dry Days
23
Rainfall
80
mm
Sun Hours
7.6
Hrs
