Best Time to See Rattlesnakes in Arizona
August, July and September is the best time to see rattlesnakes in Arizona. Based on 20,753 verified iNaturalist observations, here is exactly when rattlesnakes 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.
Eastern Diamondback Rattlesnake · Scott Allen Davis CC BY
Panamint Rattlesnake · Matt Berger CC BY
Red Diamond Rattlesnake · Amy Huie CC BY
20,753 verified observations of rattlesnakes in Arizona, recorded across 12 months of the year on iNaturalist.
When rattlesnakes are recorded in Arizona
Peak month
August
5,423 records (26.1% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 59 | 0.3% |
| February | 169 | 0.8% |
| March | 1,067 | 5.1% |
| April | 1,911 | 9.2% |
| May | 1,946 | 9.4% |
| June | 1,525 | 7.3% |
| Julypeak | 3,942 | 19% |
| Augustpeak | 5,423 | 26.1% |
| Septemberpeak | 3,251 | 15.7% |
| October | 1,033 | 5% |
| November | 348 | 1.7% |
| December | 79 | 0.4% |
Rattlesnakes you are most likely to see
| Species | Verified observations |
|---|---|
| Western Diamond-backed Rattlesnake | 10,317 |
| Western Black-tailed Rattlesnake | 2,920 |
| Mojave Rattlesnake | 2,187 |
| Sidewinder | 1,192 |
| Tiger Rattlesnake | 925 |
| Arizona Black Rattlesnake | 730 |
| Rock Rattlesnake | 713 |
| Southwestern Speckled Rattlesnake | 706 |
Weather to expect, source Open-Meteo
Typical weather in Arizona
Recent typical conditions by month, so you can plan a trip around both when rattlesnakes are active and what the weather is doing. The best months to look for rattlesnakes 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 rattlesnakes in Arizona peak in August, when 5,423 of the year's 20,753 verified observations are logged — about 26.1% of the annual total. Activity stays high through August, July and September.
The quietest stretch is January and December, when rattlesnakes are hardest to find — January sees just 59 records. If a reliable sighting matters, plan around the peak window rather than the off-season.
The rattlesnakes you are most likely to encounter in Arizona are Western Diamond-backed Rattlesnake, Western Black-tailed Rattlesnake and Mojave Rattlesnake — 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 rattlesnakes 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 rattlesnakes in Arizona?+
August is the single best month, and the broader peak window runs through August, July and September, based on 20,753 verified iNaturalist observations.
When are rattlesnakes hardest to see in Arizona?+
January is the quietest month for rattlesnakes in Arizona, with only 59 verified records.
Are rattlesnakes active year-round in Arizona?+
Rattlesnakes are recorded in 12 of 12 months in Arizona, so they can be seen year-round, with a clear peak in August.
More wildlife in Arizona