Best Time to See Black Widows in Arizona
September, August and July is the best time to see black widows in Arizona. Based on 2,733 verified iNaturalist observations, here is exactly when black widows are most active across the year in Arizona.
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
2,733 verified observations of black widows in Arizona, recorded across 12 months of the year on iNaturalist.
When black widows are recorded in Arizona
Peak month
September
449 records (16.4% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 57 | 2.1% |
| February | 56 | 2% |
| March | 146 | 5.3% |
| April | 228 | 8.3% |
| May | 250 | 9.1% |
| June | 277 | 10.1% |
| Julypeak | 340 | 12.4% |
| Augustpeak | 442 | 16.2% |
| Septemberpeak | 449 | 16.4% |
| October | 284 | 10.4% |
| November | 117 | 4.3% |
| December | 87 | 3.2% |
Black Widows you are most likely to see
| Species | Verified observations |
|---|---|
| Western Black Widow | 2,476 |
| Brown Widow | 48 |
Weather to expect, source Open-Meteo
Typical weather in Arizona
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 64 to 91 degrees Fahrenheit, so pack for that.
| Month | Avg high | Avg low | Rain |
|---|---|---|---|
| Jan | 52°F | 34°F | 1.9" |
| Feb | 52°F | 34°F | 1.9" |
| Mar | 58°F | 39°F | 2.7" |
| Apr | 71°F | 49°F | 0.2" |
| May | 77°F | 56°F | 0.3" |
| Jun | 88°F | 66°F | 0.3" |
| Julbest time | 91°F | 72°F | 2.7" |
| Augbest time | 88°F | 70°F | 2.2" |
| Sepbest time | 84°F | 64°F | 1.4" |
| Oct | 73°F | 52°F | 0.6" |
| Nov | 63°F | 43°F | 1.5" |
| Dec | 53°F | 36°F | 2" |
Typical recent conditions (5-year means) from the Open-Meteo archive, averaged for Arizona. Weather varies year to year, so treat these as a guide.
Sightings of black widows in Arizona peak in September, when 449 of the year's 2,733 verified observations are logged — about 16.4% of the annual total. Activity stays high through September, August and July.
The quietest stretch is February and January, when black widows are hardest to find — February sees just 56 records. 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 Arizona are Western 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 Arizona
- Chiricahua National Monument — National Monument
- Coronado National Memorial — National Memorial
- Fort Bowie National Historic Site — National Historic Site
- Grand Canyon National Park — National Park
- Lake Mead National Recreation Area — National Recreation Area
- Montezuma Castle National Monument — National Monument
Frequently asked questions
What is the best month to see black widows in Arizona?+
September is the single best month, and the broader peak window runs through September, August and July, based on 2,733 verified iNaturalist observations.
When are black widows hardest to see in Arizona?+
February is the quietest month for black widows in Arizona, with only 56 verified records.
Are black widows active year-round in Arizona?+
Black widows are recorded in 12 of 12 months in Arizona, so they can be seen year-round, with a clear peak in September.
More wildlife in Arizona