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Best Time for the US Southwest Grand Circle
Sweet spot: February, November, January — computed from NASA POWER climate normals across the route's overnight towns, balancing temperature, rainfall and daylight.
Desert heat is serious — hike at dawn, carry more water than feels reasonable, and nap midday.
Bryce and both canyon rims sit high — expect snow and icy trails; carry traction spikes.
| Month | Temp | Rain | Daylight | |
|---|---|---|---|---|
| January | -16.2–19.1°C | 24 mm | 9.7 h | ❄ |
| February | -16.0–21.4°C | 25 mm | 10.6 h | ❄ |
| March | -9.8–27.1°C | 19 mm | 11.7 h | ❄ |
| April | -5.4–31.0°C | 14 mm | 13.0 h | ❄ |
| May | -2.5–37.1°C | 12 mm | 14.0 h | ❄ |
| June | 3.7–40.1°C | 6 mm | 14.5 h | |
| July | 11.7–40.9°C | 28 mm | 14.3 h | |
| August | 9.7–39.5°C | 30 mm | 13.4 h | |
| September | 1.0–38.4°C | 22 mm | 12.2 h | ❄ |
| October | -8.1–32.0°C | 24 mm | 11.0 h | ❄ |
| November | -11.1–25.2°C | 16 mm | 10.0 h | ❄ |
| December | -15.1–18.3°C | 23 mm | 9.5 h | ❄ |