Oshkosh Weather in September

What's the weather like in Oshkosh (Nebraska) in September 2025?

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

September is in the fall / autumn in Oshkosh and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a comfortable 26°C (79°F), whilst at night 8°C (46°F) is normal.

Oshkosh weather averages (imperial / metric)
Daytime temperature 26.3°C 79.3°F
Nightly temperature 7.7°C 45.9°F
Average temperature 17°C 62.6°F
Daily sunshine 9.5 hrs
Avg rainfall 35 mm 1.4 ins
Rainy days 7 days
Sea temperature 17.6°C 63.6°F
Humidity 58%
Windspeed 17.3kph 11 mph

On average September is the 6th wettest month of the year in Oshkosh with around 35mm 1.4 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 7 days, although this may vary considerably.

On the flip side this corresponds to an average of 9.5 hours of sunshine per day.

September temperatures in Oshkosh

Oshkosh average temperature in September

September rainfall

Oshkosh average rain in September

September hourly sunshine

Oshkosh 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 Oshkosh 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

Oshkosh weather stats

Oshkosh weather statistics
Hottest month: July 32.3°C 90.1°F
Driest month: January 9mm 0.4ins
Sunniest month: July 11.8hrs
Coldest month: January 3.8°C 38.8°F
Wettest month: May 84mm 3.3ins
Map showing location of Oshkosh (41.40498, -102.34436) Oshkosh map pin © Google

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