Late September through late October, or April through May. These shoulder seasons offer the best combination of mild temperatures (average highs in the 70s–80s°F), dramatically lower crowd density than summer, and favorable trail conditions. October's average high is ~75°F—ideal for strenuous hikes like Angels Landing and The Narrows—while fall foliage adds color to the canyon. Spring (April–May) offers wildflowers, warming temperatures (average highs 72–82°F), and still-manageable visitor numbers before Memorial Day crowds arrive. Both seasons avoid summer's dangerous flash flood risk (monsoon season roughly July–September) and winter's ice-covered trails
| Month | High (°F) | Low (°F) | Notes |
|---|---|---|---|
| Jan | 40 | 19 | crisp & mostly dry |
| Feb | 43 | 22 | crisp & mostly dry |
| Mar | 52 | 28 | cool & mostly dry |
| Apr | 62 | 36 | mild & mostly dry |
| May | 71 | 46 | mild & sunny |
| Jun | 84 | 58 | warm & sunny |
| Jul | 88 | 64 | hot & sunny |
| Aug | 85 | 62 | hot & sunny |
| Sep | 79 | 54 | warm & sunny |
| Oct | 65 | 41 | mild & sunny |
| Nov | 54 | 31 | cool & sunny |
| Dec | 41 | 21 | crisp & mostly dry |