Rochester Weather in September

What's the weather like in Rochester (Indiana) in September 2025?

The climate in Rochester during September can be summarized as mild and a little damp.

September is in the fall / autumn in Rochester and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 24°C (76°F), whilst at night 11°C (51°F) is normal.

Rochester weather averages (imperial / metric)
Daytime temperature 24.2°C 75.5°F
Nightly temperature 10.7°C 51.2°F
Average temperature 17.4°C 63.3°F
Daily sunshine 8.6 hrs
Avg rainfall 85 mm 3.4 ins
Rainy days 9 days
Sea temperature 19.8°C 67.7°F
Humidity 73%
Windspeed 14.4kph 9 mph

On average September is the 6th wettest month of the year in Rochester with around 85mm 3.4 inches of rain making it a a little damp 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 Rochester

Rochester average temperature in September

September rainfall

Rochester average rain in September

September hourly sunshine

Rochester 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 Rochester 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

Rochester weather stats

Rochester weather statistics
Hottest month: July 28.9°C 84°F
Driest month: February 44mm 1.7ins
Sunniest month: July 11.2hrs
Coldest month: January -1.2°C 29.8°F
Wettest month: June 105mm 4.1ins
Map showing location of Rochester (41.06476, -86.21583) Rochester map pin © Google

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