Wisconsin weather in September
One place stands in for Wisconsin here — these are Door County's numbers, not a statewide average.
Based on 1 weather station, in Door County. One station — Door County, out on the peninsula between the bay and the lake; inland Wisconsin runs colder overnight than this shoreline does.
Door County & the Lakeshore
Highs near 69°, nights around 51°, and 3.1 in of rain in a typical September.
| Place | Highs / lows | Wet days | The short version |
|---|---|---|---|
| Door County | 69° / 51° | 6 | The crowds go, the water stays warm — the local trade. |
Each place above has its own page for the full story — what the month feels like, what to pack, and whether the timing is right.