The temperatures in Grants Pass in September are quite cold with temperatures between 6°C and 28°C, warm clothes are a must.
The wather in Grants Pass in September can vary between cold and nice weather days. Expect a few rainy days but usually not more than 3.
Our weather forecast can give you a great sense of what weather to expect in Grants Pass in September 2025.
If you’re planning to visit Grants Pass in the near future, we highly recommend that you review the 14 day weather forecast for Grants Pass before you arrive.
Temperatures
28° / 6°
Rainy Days
2
Snowy Days
0
Dry Days
28
Rainfall
33
mm
Sun Hours
9.8
Hrs
