Oregon Weather in September

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

The climate in Oregon during September can be summarized as warm and damp.

September is in the fall / autumn in Oregon and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 26°C (79°F), whilst at night 13°C (55°F) is normal.

Oregon weather averages (imperial / metric)
Daytime temperature 26°C 78.8°F
Nightly temperature 13°C 55.4°F
Average temperature 19.5°C 67.1°F
Daily sunshine 8.6 hrs
Avg rainfall 107 mm 4.2 ins
Rainy days 8 days
Sea temperature 20°C 67.9°F
Humidity 71%
Windspeed 15.5kph 10 mph

On average September is the 4th wettest month of the year in Oregon with around 107mm 4.2 inches of rain making it a damp time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.6 hours of sunshine per day.

September temperatures in Oregon

Oregon average temperature in September

September rainfall

Oregon average rain in September

September hourly sunshine

Oregon 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 Oregon 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

Oregon weather stats

Oregon weather statistics
Hottest month: July 31.5°C 88.7°F
Driest month: January 22mm 0.9ins
Sunniest month: July 11.4hrs
Coldest month: January 1.1°C 34°F
Wettest month: June 122mm 4.8ins
Map showing location of Oregon (39.98694, -95.14498) Oregon map pin © Google

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