Based on 10,205 research-grade iNaturalist observations in Wisconsin, Monarch is most often recorded in July; in Wisconsin it behaves like a summer visitor / breeder. It ranks #1 among butterflies recorded in the state in our data.
Danaus plexippus
Monarch in Wisconsin by month
Bars show research-grade observations per month. They mix true seasonality with how often people are outdoors, so treat small numbers with caution.
Also seen in Wisconsin in July
Karner Blue
Red Admiral
Small White
Northern Pearly-eye
Common Wood-Nymph
Silver-spotted Skipper
Black Swallowtail
Eastern Tiger Swallowtail
Places to look in Wisconsin
State ParkAztalan State Park
State ParkWyalusing State Park
National ForestChequamegon–Nicolet National Forest
State ParkMerrick State Park
State ParkPerrot State Park
State ParkLake Kegonsa State Park
FAQ
When does Monarch appear in Wisconsin?
Mainly June–September, with the most records in July.
How common is Monarch in Wisconsin?
It ranks #1 by number of iNaturalist observations among butterflies in Wisconsin (10,205 records in our sample).