Defiance Weather in September

What's the weather like in Defiance (Ohio) in September 2025?

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

September is in the fall / autumn in Defiance and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 24°C (76°F), whilst at night 11°C (52°F) is normal.

Defiance weather averages (imperial / metric)
Daytime temperature 24.3°C 75.7°F
Nightly temperature 11.3°C 52.3°F
Average temperature 17.8°C 64°F
Daily sunshine 8.5 hrs
Avg rainfall 73 mm 2.9 ins
Rainy days 9 days
Sea temperature 20.6°C 69°F
Humidity 74%
Windspeed 13.3kph 8 mph

On average September is the 6th driest month of the year in Defiance with around 73mm 2.9 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 8.5 hours of sunshine per day.

September temperatures in Defiance

Defiance average temperature in September

September rainfall

Defiance average rain in September

September hourly sunshine

Defiance 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 Defiance in September 2025.

Other monthly averages

Best places to visit in September

UV index Best time to go?

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Current (hourly) weather 15 day forecast

Defiance weather stats

Defiance weather statistics
Hottest month: July 28.7°C 83.7°F
Driest month: February 47mm 1.9ins
Sunniest month: July 11hrs
Coldest month: January -0.9°C 30.4°F
Wettest month: July 98mm 3.9ins
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