Based on 1,191 research-grade iNaturalist observations in Vermont, Clouded Sulphur is most often recorded in September; in Vermont it behaves like a seasonal. It ranks #12 among butterflies recorded in the state in our data.
Colias philodice
Clouded Sulphur in Vermont 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 Vermont in September
Monarch
Small White
Painted Lady
Viceroy
Great Spangled Fritillary
Eastern Comma
Eastern Giant Swallowtail
Red Admiral
Places to look in Vermont
State ParkElmore State Park
State ParkQuechee State Park
State ParkWilgus State Park
State ParkMount Philo State Park
State ParkCoolidge State Park
State ParkCrystal Lake State Park
FAQ
When does Clouded Sulphur appear in Vermont?
Mainly July–October, with the most records in September.
How common is Clouded Sulphur in Vermont?
It ranks #12 by number of iNaturalist observations among butterflies in Vermont (1,191 records in our sample).