Based on 824 research-grade iNaturalist observations in South Dakota, Monarch is most often recorded in September; in South Dakota it behaves like a summer visitor / breeder. It ranks #1 among butterflies recorded in the state in our data.
Danaus plexippus
Monarch in South Dakota 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 South Dakota in September
Red Admiral
Painted Lady
Orange Sulphur
Melissa Blue
Small White
Eastern Comma
Silver-spotted Skipper
Common Checkered-Skipper
Places to look in South Dakota
State ParkCuster State Park
National ForestBlack Hills National Forest
State ParkPalisades State Park
State ParkSpirit Mound Historic Prairie
State ParkHartford Beach State Park
State ParkLake Herman State Park
FAQ
When does Monarch appear in South Dakota?
Mainly June–September, with the most records in September.
How common is Monarch in South Dakota?
It ranks #1 by number of iNaturalist observations among butterflies in South Dakota (824 records in our sample).