Auburn Weather in September

What's the weather like in Auburn (Washington) in September 2025?

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

September is in the fall / autumn in Auburn and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 22°C (71°F), whilst at night 9°C (48°F) is normal.

Auburn weather averages (imperial / metric)
Daytime temperature 21.5°C 70.6°F
Nightly temperature 8.8°C 47.8°F
Average temperature 15.1°C 59.2°F
Daily sunshine 8.1 hrs
Avg rainfall 53 mm 2.1 ins
Rainy days 9 days
Sea temperature 12.8°C 55.1°F
Humidity 72%
Windspeed 11.9kph 7 mph

On average September is the 4th driest month of the year in Auburn with around 53mm 2.1 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.1 hours of sunshine per day.

September temperatures in Auburn

Auburn average temperature in September

September rainfall

Auburn average rain in September

September hourly sunshine

Auburn 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 Auburn 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

Auburn weather stats

Auburn weather statistics
Hottest month: July 24.4°C 75.9°F
Driest month: July 23mm 0.9ins
Sunniest month: July 11hrs
Coldest month: January 7°C 44.6°F
Wettest month: December 159mm 6.3ins
Map showing location of Auburn (47.30732, -122.22845) Auburn map pin © Google

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