Best Time to See Black Widows in Pennsylvania
June, May and July is the best time to see black widows in Pennsylvania. Based on 152 verified iNaturalist observations, here is exactly when black widows 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.
Northern Black Widow · Joseph McPhail CC BY
Western Black Widow · Rebecca Ray CC BY
Western Black Widow · Michael Eisen CC BY
152 verified observations of black widows in Pennsylvania, recorded across 10 months of the year on iNaturalist.
When black widows are recorded in Pennsylvania
Peak month
June
43 records (28.3% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 1 | 0.7% |
| February | 0 | 0% |
| March | 0 | 0% |
| April | 7 | 4.6% |
| Maypeak | 25 | 16.4% |
| Junepeak | 43 | 28.3% |
| Julypeak | 23 | 15.1% |
| August | 12 | 7.9% |
| September | 14 | 9.2% |
| October | 21 | 13.8% |
| November | 4 | 2.6% |
| December | 2 | 1.3% |
Black Widows you are most likely to see
| Species | Verified observations |
|---|---|
| Northern Black Widow | 112 |
| Southern Black Widow | 21 |
| Brown Widow | 3 |
Weather to expect, source Open-Meteo
Typical weather in Pennsylvania
Recent typical conditions by month, so you can plan a trip around both when black widows are active and what the weather is doing. The best months to look for black widows sit around 49 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" |
| Maybest time | 70°F | 49°F | 4.1" |
| Junbest time | 79°F | 59°F | 3.9" |
| Julbest time | 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.
Sightings of black widows in Pennsylvania peak in June, when 43 of the year's 152 verified observations are logged — about 28.3% of the annual total. Activity stays high through June, May and July.
The quietest stretch is February, March and January, when black widows are hardest to find — no verified records exist for February. If a reliable sighting matters, plan around the peak window rather than the off-season.
The black widows you are most likely to encounter in Pennsylvania are Northern Black Widow, Southern Black Widow and Brown Widow — 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 black widows 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 black widows in Pennsylvania?+
June is the single best month, and the broader peak window runs through June, May and July, based on 152 verified iNaturalist observations.
When are black widows hardest to see in Pennsylvania?+
February is the quietest month for black widows in Pennsylvania, with no verified records on iNaturalist.
Are black widows active year-round in Pennsylvania?+
Black widows are recorded in 10 of 12 months in Pennsylvania, concentrated around June and May.
More wildlife in Pennsylvania