Best Time to See Tarantulas in Utah
September, October and August is the best time to see tarantulas in Utah. Based on 1,062 verified iNaturalist observations, here is exactly when tarantulas are most active across the year in Utah.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated July 22, 2026.
Desert Tarantula · 115527224325819725585 CC BY
Texas Brown Tarantula · Chris Stahl CC BY
Steindachner's Ebony Tarantula · Millie Basden CC BY
1,062 verified observations of tarantulas in Utah, recorded across 11 months of the year on iNaturalist.
When tarantulas are recorded in Utah
Peak month
September
330 records (31.1% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 0 | 0% |
| February | 2 | 0.2% |
| March | 5 | 0.5% |
| April | 22 | 2.1% |
| May | 41 | 3.9% |
| June | 40 | 3.8% |
| July | 66 | 6.2% |
| Augustpeak | 223 | 21% |
| Septemberpeak | 330 | 31.1% |
| Octoberpeak | 289 | 27.2% |
| November | 43 | 4% |
| December | 1 | 0.1% |
Tarantulas you are most likely to see
| Species | Verified observations |
|---|---|
| Desert Tarantula | 971 |
| Aphonopelma prenticei | 18 |
| Grand Canyon Black Tarantula | 15 |
Weather to expect, source Open-Meteo
Typical weather in Utah
Recent typical conditions by month, so you can plan a trip around both when tarantulas are active and what the weather is doing. The best months to look for tarantulas sit around 38 to 87 degrees Fahrenheit, so pack for that.
| Month | Avg high | Avg low | Rain |
|---|---|---|---|
| Jan | 33°F | 19°F | 1.5" |
| Feb | 35°F | 20°F | 1.5" |
| Mar | 43°F | 27°F | 2.8" |
| Apr | 55°F | 33°F | 1.6" |
| May | 66°F | 42°F | 1.3" |
| Jun | 79°F | 53°F | 0.7" |
| Jul | 89°F | 62°F | 0.3" |
| Augbest time | 87°F | 61°F | 0.3" |
| Sepbest time | 78°F | 52°F | 0.6" |
| Octbest time | 62°F | 38°F | 1.1" |
| Nov | 48°F | 28°F | 1.3" |
| Dec | 36°F | 20°F | 2.6" |
Typical recent conditions (5-year means) from the Open-Meteo archive, averaged for Utah. Weather varies year to year, so treat these as a guide.
More on tarantulas in Utah:
Sightings of tarantulas in Utah peak in September, when 330 of the year's 1,062 verified observations are logged — about 31.1% of the annual total. Activity stays high through September, October and August.
The quietest stretch is January and December, when tarantulas 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 tarantulas you are most likely to encounter in Utah are Desert Tarantula, Aphonopelma prenticei and Grand Canyon Black Tarantula — 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 tarantulas in Utah
- Bryce Canyon National Park — National Park
- Capitol Reef National Park — National Park
- Cedar Breaks National Monument — National Monument
- Dinosaur National Monument — National Monument
- Zion National Park — National Park
- Arches National Park — National Park
Frequently asked questions
What is the best month to see tarantulas in Utah?+
September is the single best month, and the broader peak window runs through September, October and August, based on 1,062 verified iNaturalist observations.
When are tarantulas hardest to see in Utah?+
January is the quietest month for tarantulas in Utah, with no verified records on iNaturalist.
Are tarantulas active year-round in Utah?+
Tarantulas are recorded in 11 of 12 months in Utah, so they can be seen year-round, with a clear peak in September.
More places to see tarantulas
More wildlife in Utah