Greenville Weather in September

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

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

September is in the fall / autumn in Greenville and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 25°C (77°F), whilst at night 11°C (51°F) is normal.

Greenville weather averages (imperial / metric)
Daytime temperature 24.8°C 76.6°F
Nightly temperature 10.6°C 51.1°F
Average temperature 17.7°C 63.9°F
Daily sunshine 8.6 hrs
Avg rainfall 68 mm 2.7 ins
Rainy days 9 days
Sea temperature 21.3°C 70.4°F
Humidity 73%
Windspeed 13.3kph 8 mph

On average September is the 4th driest month of the year in Greenville with around 68mm 2.7 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 8.6 hours of sunshine per day.

September temperatures in Greenville

Greenville average temperature in September

September rainfall

Greenville average rain in September

September hourly sunshine

Greenville 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 Greenville 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

Greenville weather stats

Greenville weather statistics
Hottest month: July 28.6°C 83.5°F
Driest month: January 52mm 2ins
Sunniest month: June 10.7hrs
Coldest month: January -0°C 32°F
Wettest month: July 106mm 4.2ins
Map showing location of Greenville (40.10283, -84.63301) Greenville map pin © Google

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