The temperatures in Yellowstone in October are quite cold with temperatures between 9°C and 19°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Yellowstone during the month of October. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Yellowstone in October 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
19° / 9°
Rainy Days
6
Snowy Days
0
Dry Days
25
Rainfall
94
mm
Sun Hours
6.8
Hrs