Grants Pass Weather in September

What's the weather like in Grants Pass (Oregon) in September 2025?

The climate in Grants Pass during September can be summarized as mild and dry.

September is in the fall / autumn in Grants Pass and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a comfortable 26°C (80°F), whilst at night 6°C (44°F) is normal.

Grants Pass weather averages (imperial / metric)
Daytime temperature 26.4°C 79.5°F
Nightly temperature 6.4°C 43.5°F
Average temperature 16.4°C 61.5°F
Daily sunshine 10.7 hrs
Avg rainfall 25 mm 1 ins
Rainy days 5 days
Sea temperature 13.9°C 57°F
Humidity 62%
Windspeed 10.1kph 6 mph

On average September is the 4th driest month of the year in Grants Pass with around 25mm 1 inches of rain making it a dry time to visit. This rainfall is typically spread over 5 days, although this may vary considerably.

On the flip side this corresponds to an average of 10.7 hours of sunshine per day.

September temperatures in Grants Pass

Grants Pass average temperature in September

September rainfall

Grants Pass average rain in September

September hourly sunshine

Grants Pass average rain in September

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Grants Pass in September 2025.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Grants Pass weather stats

Grants Pass weather statistics
Hottest month: July 29.5°C 85.1°F
Driest month: July 7mm 0.3ins
Sunniest month: July 13.4hrs
Coldest month: December 7°C 44.6°F
Wettest month: December 142mm 5.6ins
Map showing location of Grants Pass (42.43901, -123.32839) Grants Pass map pin © Google

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