Oregon City Weather in September

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

The climate in Oregon City during September can be summarized as mild and reasonably dry.

September is in the fall / autumn in Oregon City and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a comfortable 23°C (74°F), whilst at night 9°C (49°F) is normal.

Oregon City weather averages (imperial / metric)
Daytime temperature 23.3°C 73.9°F
Nightly temperature 9.4°C 48.8°F
Average temperature 16.3°C 61.3°F
Daily sunshine 8.7 hrs
Avg rainfall 59 mm 2.3 ins
Rainy days 8 days
Sea temperature 13.3°C 55.9°F
Humidity 68%
Windspeed 11.5kph 7 mph

On average September is the 4th driest month of the year in Oregon City with around 59mm 2.3 inches of rain making it a reasonably dry 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 8.7 hours of sunshine per day.

September temperatures in Oregon City

Oregon City average temperature in September

September rainfall

Oregon City average rain in September

September hourly sunshine

Oregon City 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 City 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 City weather stats

Oregon City weather statistics
Hottest month: August 26.1°C 79°F
Driest month: July 22mm 0.9ins
Sunniest month: July 11.7hrs
Coldest month: January 7°C 44.6°F
Wettest month: December 204mm 8ins
Map showing location of Oregon City (45.35734, -122.60676) Oregon City map pin © Google

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