Best Time to See Black Widows in Massachusetts
June, September and May is the best time to see black widows in Massachusetts. Based on 173 verified iNaturalist observations, here is exactly when black widows are most active across the year in Massachusetts.
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
173 verified observations of black widows in Massachusetts, recorded across 10 months of the year on iNaturalist.
When black widows are recorded in Massachusetts
Peak month
June
71 records (41% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 0 | 0% |
| February | 0 | 0% |
| March | 1 | 0.6% |
| April | 4 | 2.3% |
| Maypeak | 23 | 13.3% |
| Junepeak | 71 | 41% |
| July | 21 | 12.1% |
| August | 9 | 5.2% |
| Septemberpeak | 28 | 16.2% |
| October | 9 | 5.2% |
| November | 5 | 2.9% |
| December | 2 | 1.2% |
Black Widows you are most likely to see
| Species | Verified observations |
|---|---|
| Northern Black Widow | 161 |
| Brown Widow | 5 |
| Southern Black Widow | 4 |
Weather to expect, source Open-Meteo
Typical weather in Massachusetts
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 47 to 78 degrees Fahrenheit, so pack for that.
| Month | Avg high | Avg low | Rain |
|---|---|---|---|
| Jan | 37°F | 22°F | 3.8" |
| Feb | 39°F | 22°F | 3.4" |
| Mar | 48°F | 28°F | 3.6" |
| Apr | 57°F | 38°F | 4.6" |
| Maybest time | 68°F | 47°F | 3.4" |
| Junbest time | 78°F | 58°F | 3.6" |
| Jul | 83°F | 65°F | 5.4" |
| Aug | 82°F | 64°F | 3.5" |
| Sepbest time | 73°F | 56°F | 5.3" |
| Oct | 62°F | 47°F | 5.3" |
| Nov | 50°F | 34°F | 3.1" |
| Dec | 42°F | 27°F | 5.9" |
Typical recent conditions (5-year means) from the Open-Meteo archive, averaged for Massachusetts. Weather varies year to year, so treat these as a guide.
Sightings of black widows in Massachusetts peak in June, when 71 of the year's 173 verified observations are logged — about 41% of the annual total. Activity stays high through June, September and May.
The quietest stretch is January, February and March, when black widows 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 black widows you are most likely to encounter in Massachusetts are Northern Black Widow, Brown Widow and Southern Black 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 Massachusetts
- Appalachian National Scenic Trail — National Scenic Trail
- Blackstone River Valley National Historical Park — National Historical Park
- Boston Harbor Islands National Recreation Area — National Recreation Area
- Cape Cod National Seashore — National Seashore
- Adams National Historical Park — National Historical Park
- Boston African American National Historic Site — National Historic Site
Frequently asked questions
What is the best month to see black widows in Massachusetts?+
June is the single best month, and the broader peak window runs through June, September and May, based on 173 verified iNaturalist observations.
When are black widows hardest to see in Massachusetts?+
January is the quietest month for black widows in Massachusetts, with no verified records on iNaturalist.
Are black widows active year-round in Massachusetts?+
Black widows are recorded in 10 of 12 months in Massachusetts, concentrated around June and September.
More places to see black widows
More wildlife in Massachusetts