Best Time to See Copperheads in Pennsylvania
June, August and July is the best time to see copperheads in Pennsylvania. Based on 416 verified iNaturalist observations, here is exactly when copperheads 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 July 22, 2026.
Eastern Copperhead · Court Harding CC BY
Eastern Copperhead · Mila C. CC BY
Eastern Copperhead · Alan Rockefeller CC BY
416 verified observations of copperheads in Pennsylvania, recorded across 9 months of the year on iNaturalist.
When copperheads are recorded in Pennsylvania
Peak month
June
117 records (28.1% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 0 | 0% |
| February | 1 | 0.2% |
| March | 0 | 0% |
| April | 4 | 1% |
| May | 56 | 13.5% |
| Junepeak | 117 | 28.1% |
| Julypeak | 76 | 18.3% |
| Augustpeak | 84 | 20.2% |
| September | 64 | 15.4% |
| October | 12 | 2.9% |
| November | 0 | 0% |
| December | 2 | 0.5% |
Copperheads you are most likely to see
| Species | Verified observations |
|---|---|
| Eastern Copperhead | 416 |
Weather to expect, source Open-Meteo
Typical weather in Pennsylvania
Recent typical conditions by month, so you can plan a trip around both when copperheads are active and what the weather is doing. The best months to look for copperheads sit around 59 to 86 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" |
| May | 70°F | 49°F | 4.1" |
| Junbest time | 79°F | 59°F | 3.9" |
| Julbest time | 86°F | 65°F | 3.2" |
| Augbest time | 84°F | 64°F | 4.3" |
| Sep | 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.
Sightings of copperheads in Pennsylvania peak in June, when 117 of the year's 416 verified observations are logged — about 28.1% of the annual total. Activity stays high through June, August and July.
The quietest stretch is January, March and November, when copperheads are hardest to find — no verified records exist for January. If a reliable sighting matters, plan around the peak window rather than the off-season.
The copperheads you are most likely to encounter in Pennsylvania are Eastern Copperhead — 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 copperheads 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 copperheads in Pennsylvania?+
June is the single best month, and the broader peak window runs through June, August and July, based on 416 verified iNaturalist observations.
When are copperheads hardest to see in Pennsylvania?+
January is the quietest month for copperheads in Pennsylvania, with no verified records on iNaturalist.
Are copperheads active year-round in Pennsylvania?+
Copperheads are recorded in 9 of 12 months in Pennsylvania, concentrated around June and August.
More places to see copperheads
More wildlife in Pennsylvania