Based on 1,193 research-grade iNaturalist observations in District of Columbia, Monarch is most often recorded in September; in District of Columbia it behaves like a seasonal. It ranks #2 among butterflies recorded in the state in our data.
Danaus plexippus
Monarch in District of Columbia 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 District of Columbia in September
Huron Skipper
Eastern Tiger Swallowtail
Common Buckeye
Fiery Skipper
Small White
Eastern Tailed-Blue
Variegated Fritillary
Silver-spotted Skipper
Places to look in District of Columbia
Botanical GardenUnited States Botanic Garden
Botanical GardenUnited States National Arboretum
Botanical GardenBartholdi Park
FAQ
When does Monarch appear in District of Columbia?
Mainly August–October, with the most records in September.
How common is Monarch in District of Columbia?
It ranks #2 by number of iNaturalist observations among butterflies in District of Columbia (1,193 records in our sample).