Best Time to See Chipmunks in Pennsylvania
May, April and September is the best time to see chipmunks in Pennsylvania. Based on 27,530 verified iNaturalist observations, here is exactly when chipmunks are most active across the year in Pennsylvania.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated June 28, 2026.
27,530 verified observations of chipmunks in Pennsylvania, recorded across 12 months of the year on iNaturalist.
When chipmunks are recorded in Pennsylvania
Peak month
May
3,987 records (14.5% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 1,073 | 3.9% |
| February | 1,291 | 4.7% |
| March | 1,882 | 6.8% |
| Aprilpeak | 3,864 | 14% |
| Maypeak | 3,987 | 14.5% |
| June | 3,579 | 13% |
| July | 1,868 | 6.8% |
| August | 1,335 | 4.8% |
| Septemberpeak | 3,803 | 13.8% |
| October | 2,390 | 8.7% |
| November | 1,402 | 5.1% |
| December | 1,056 | 3.8% |
Chipmunks you are most likely to see
| Species | Verified observations |
|---|---|
| Eastern Gray Squirrel | 13,792 |
| Eastern Chipmunk | 5,796 |
| Groundhog | 4,562 |
| American Red Squirrel | 1,567 |
| Eastern Fox Squirrel | 1,078 |
| Southern Flying Squirrel | 299 |
| Northern Flying Squirrel | 19 |
Sightings of chipmunks in Pennsylvania peak in May, when 3,987 of the year's 27,530 verified observations are logged — about 14.5% of the annual total. Activity stays high through May, April and September.
The quietest stretch is December, January and February, when chipmunks are hardest to find — December sees just 1,056 records. If a reliable sighting matters, plan around the peak window rather than the off-season.
The chipmunks you are most likely to encounter in Pennsylvania are Eastern Gray Squirrel, Eastern Chipmunk and Groundhog — the most-recorded species in the state. Each keeps its own seasonal rhythm, but the month-by-month pattern above reflects every reported sighting together.
Where to go
Best places to see chipmunks in Pennsylvania
- Appalachian National Scenic Trail — National Scenic Trail
- Captain John Smith Chesapeake National Historic Trail — National Historic Trail
- Chesapeake Bay
- Delaware Water Gap National Recreation Area — National Recreation Area
- Fort Necessity National Battlefield — National Battlefield
- Friendship Hill National Historic Site — National Historic Site
Tours and experiences nearby
Viator
Book a chipmunk tour in Pennsylvania
Guided wildlife tours, boat trips and nature experiences, with free cancellation on most.
Booking.com
Stay near Appalachian National Scenic Trail
Compare hotels, cabins and lodges close to the best chipmunk viewing in Pennsylvania.
Frequently asked questions
What is the best month to see chipmunks in Pennsylvania?+
May is the single best month, and the broader peak window runs through May, April and September, based on 27,530 verified iNaturalist observations.
When are chipmunks hardest to see in Pennsylvania?+
December is the quietest month for chipmunks in Pennsylvania, with only 1,056 verified records.
Are chipmunks active year-round in Pennsylvania?+
Chipmunks are recorded in 12 of 12 months in Pennsylvania, so they can be seen year-round, with a clear peak in May.
More wildlife in Pennsylvania