Based on 2,059 research-grade iNaturalist observations in Massachusetts, Groundhog is most often recorded in June; in Massachusetts it behaves like a summer visitor / breeder. It ranks #10 among mammals recorded in the state in our data.
Marmota monax
Groundhog in Massachusetts 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 Massachusetts in June
Eastern Cottontail
Eastern Gray Squirrel
Eastern Chipmunk
White-tailed Deer
American Red Squirrel
Common Raccoon
Red Fox
Coyote
Places to look in Massachusetts
Botanical GardenArnold Arboretum
Botanical GardenBoston Public Garden
Botanical GardenBerkshire Botanical Garden
State ParkHalibut Point State Park
State ParkHammond Pond Reservation
State ParkTolland State Forest
FAQ
When does Groundhog appear in Massachusetts?
Mainly April–September, with the most records in June.
How common is Groundhog in Massachusetts?
It ranks #10 by number of iNaturalist observations among mammals in Massachusetts (2,059 records in our sample).