Best Time to See Snakes in Pennsylvania
May, June and April is the best time to see snakes in Pennsylvania. Based on 32,666 verified iNaturalist observations, here is exactly when snakes 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 Copperhead · Court Harding CC BY
Eastern Copperhead · Mila C. CC BY
Eastern Garter Snake · Mila C. CC BY
32,666 verified observations of snakes in Pennsylvania, recorded across 12 months of the year on iNaturalist.
When snakes are recorded in Pennsylvania
Peak month
May
7,249 records (22.2% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 87 | 0.3% |
| February | 108 | 0.3% |
| March | 1,066 | 3.3% |
| Aprilpeak | 4,219 | 12.9% |
| Maypeak | 7,249 | 22.2% |
| Junepeak | 7,022 | 21.5% |
| July | 3,995 | 12.2% |
| August | 3,047 | 9.3% |
| September | 3,305 | 10.1% |
| October | 2,002 | 6.1% |
| November | 434 | 1.3% |
| December | 132 | 0.4% |
Snakes you are most likely to see
| Species | Verified observations |
|---|---|
| Common Garter Snake | 10,850 |
| Common Watersnake | 4,986 |
| Central Ratsnake | 4,373 |
| DeKay's Brownsnake | 2,668 |
| Timber Rattlesnake | 2,510 |
| Ring-necked Snake | 2,155 |
| Eastern Milksnake | 1,955 |
| Red-bellied Snake | 734 |
Weather to expect, source Open-Meteo
Typical weather in Pennsylvania
Recent typical conditions by month, so you can plan a trip around both when snakes are active and what the weather is doing. The best months to look for snakes sit around 40 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" |
| Aprbest time | 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" |
| 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.
More on snakes in Pennsylvania:
Sightings of snakes in Pennsylvania peak in May, when 7,249 of the year's 32,666 verified observations are logged — about 22.2% of the annual total. Activity stays high through May, June and April.
The quietest stretch is January and February, when snakes are hardest to find — January sees just 87 records. If a reliable sighting matters, plan around the peak window rather than the off-season.
The snakes you are most likely to encounter in Pennsylvania are Common Garter Snake, Common Watersnake and Central Ratsnake — 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 snakes 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
Gear to see them
Frequently asked questions
What is the best month to see snakes in Pennsylvania?+
May is the single best month, and the broader peak window runs through May, June and April, based on 32,666 verified iNaturalist observations.
When are snakes hardest to see in Pennsylvania?+
January is the quietest month for snakes in Pennsylvania, with only 87 verified records.
Are snakes active year-round in Pennsylvania?+
Snakes 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 snakes
More wildlife in Pennsylvania