Best Time to See Chipmunks in Pennsylvania
May, June and September is the best time to see chipmunks in Pennsylvania. Based on 5,888 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.
Eastern Chipmunk · Curtis Meyers CC BY-SA
Eastern Chipmunk · GobyHunter CC BY
Eastern Chipmunk · Steve Taylor CC BY
5,888 verified observations of chipmunks in Pennsylvania, recorded across 12 months of the year on iNaturalist.
When chipmunks are recorded in Pennsylvania
Peak month
May
1,292 records (21.9% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 10 | 0.2% |
| February | 87 | 1.5% |
| March | 251 | 4.3% |
| April | 608 | 10.3% |
| Maypeak | 1,292 | 21.9% |
| Junepeak | 1,157 | 19.7% |
| July | 559 | 9.5% |
| August | 275 | 4.7% |
| Septemberpeak | 1,009 | 17.1% |
| October | 499 | 8.5% |
| November | 130 | 2.2% |
| December | 11 | 0.2% |
Chipmunks you are most likely to see
| Species | Verified observations |
|---|---|
| Eastern Chipmunk | 5,884 |
Weather to expect, source Open-Meteo
Typical weather in Pennsylvania
Recent typical conditions by month, so you can plan a trip around both when chipmunks are active and what the weather is doing. The best months to look for chipmunks sit around 49 to 79 degrees Fahrenheit, so pack for that.
| Month | Avg high | Avg low | Rain |
|---|---|---|---|
| Jan | 38°F | 23°F | 3.1" |
| Feb | 41°F | 23°F | 3.6" |
| Mar | 50°F | 31°F | 3.3" |
| Apr | 60°F | 40°F | 4.1" |
| Maybest time | 70°F | 49°F | 4.1" |
| Junbest time | 79°F | 59°F | 3.9" |
| Jul | 86°F | 65°F | 3.2" |
| Aug | 84°F | 64°F | 4.3" |
| Sepbest time | 75°F | 57°F | 3.9" |
| Oct | 64°F | 47°F | 4" |
| Nov | 51°F | 35°F | 2.4" |
| Dec | 43°F | 29°F | 4.3" |
Typical recent conditions (5-year means) from the Open-Meteo archive, averaged for Pennsylvania. Weather varies year to year, so treat these as a guide.
More on chipmunks in Pennsylvania:
Sightings of chipmunks in Pennsylvania peak in May, when 1,292 of the year's 5,888 verified observations are logged — about 21.9% of the annual total. Activity stays high through May, June and September.
The quietest stretch is January and December, when chipmunks are hardest to find — January sees just 10 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 Chipmunk — 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
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, June and September, based on 5,888 verified iNaturalist observations.
When are chipmunks hardest to see in Pennsylvania?+
January is the quietest month for chipmunks in Pennsylvania, with only 10 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 places to see chipmunks
More wildlife in Pennsylvania