Based on 1,244 research-grade iNaturalist observations in Missouri, Groundhog is most often recorded in May; in Missouri it behaves like a summer visitor / breeder. It ranks #5 among mammals recorded in the state in our data.
Marmota monax
Groundhog in Missouri 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 Missouri in May
White-tailed Deer
Eastern Cottontail
Eastern Gray Squirrel
Common Raccoon
Eastern Chipmunk
Virginia Opossum
Eastern Fox Squirrel
Mexican Long-nosed Armadillo
Places to look in Missouri
Botanical GardenMissouri Botanical Garden
National ForestMark Twain National Forest
Botanical GardenMissouri State Arboretum
State ParkBig Oak Tree State Park
State ParkTable Rock State Park
State ParkMark Twain Birthplace State Historic Site
FAQ
When does Groundhog appear in Missouri?
Mainly April–October, with the most records in May.
How common is Groundhog in Missouri?
It ranks #5 by number of iNaturalist observations among mammals in Missouri (1,244 records in our sample).