Based on 4,622 research-grade iNaturalist observations in New Hampshire, Monarch is most often recorded in August; in New Hampshire it behaves like a summer visitor / breeder. It ranks #1 among butterflies recorded in the state in our data.
Danaus plexippus
Monarch in New Hampshire 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 New Hampshire in August
Great Spangled Fritillary
Common Ringlet
Common Wood-Nymph
Eastern Tailed-Blue
American Lady
Small White
Peck's Skipper
Red-spotted Admiral
Places to look in New Hampshire
National ForestWhite Mountain National Forest
State ParkFranconia Notch State Park
State ParkOdiorne Point State Park
State ParkMount Washington State Park
State ParkRhododendron State Park
State ParkPawtuckaway State Park
FAQ
When does Monarch appear in New Hampshire?
Mainly July–September, with the most records in August.
How common is Monarch in New Hampshire?
It ranks #1 by number of iNaturalist observations among butterflies in New Hampshire (4,622 records in our sample).