Weather in Oshkosh in September
How warm is it in Oshkosh in September?
In September the typical daytime high in Oshkosh is 22.3 °C on average, from 24.6 °C at the start to 19.3 °C at the end of the month.
That is 3.8 °C cooler than in August and 7.5 °C warmer than in October.
The last 10 years were 2.4 °C warmer than more than 40 years ago.
Click a day for more: afternoon and night, the usual range, records and how fast it is warming.
Measured at the weather station Green Bay, 63 km away.