Oshkosh weather in September 2025

Expect 22°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Oshkosh in September. Check more long-term weather averages for Oshkosh in September before you book your next holiday to Wisconsin in 2025/2026.

  • 22°C maximum daytime temperature in September in Oshkosh22
    22°C max day temperature
  • 7 hours of sunshine per day
  • 10 days with some rainfall in September in Oshkosh10
    10 days with some rainfall
  • 10°C minimum night-time temperature in September in Oshkosh10
    10°C min night temperature
  • 12 hours of daylight per day in September in Oshkosh12
    12 hours of daylight per day
  • No heat & humidity in September in Oshkosh0
    No heat & humidity
  • 98 mm monthly rainfall in September in Oshkosh98
    98 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in Oshkosh5
    5 (Moderate) UV index

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The September weather guide for Wisconsin (Oshkosh) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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More about the USA

How hot is it in Oshkosh in September?

Daytime temperatures usually reach 22°C in Oshkosh in September, falling to 10°C at night.

How sunny is it in Oshkosh in September?

There are normally 7 hours of bright sunshine each day in Oshkosh in September - that's 55% of daylight hours.

Does it rain in Oshkosh in September?

There are usually 10 days with some rain in Oshkosh in September and the average monthly rainfall is 98mm.

Oshkosh September sunrise & sunset times

Browse the sunrise and sunset times for Oshkosh in September 2025. Select a month to view Oshkosh sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:18 18:29
Monday, 15th September 2025 05:34 18:04
Tuesday, 30th September 2025 05:51 17:36

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