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Best Time for Southwest Parks & Navajo Nation Grand Circle
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Sweet spot: February, March, April. Computed from NASA POWER climate normals across the route's overnight towns, balancing temperature, rainfall and daylight.
💡 Good to know
- The main paved loop avoids the most dangerous summer heat and the least reliable winter road period. Zion shuttles, Bryce snow, Navajo Nation park access, Grand Canyon conditions and desert heat remain exact-date checks.
| Month | Low | High | Rain | Daylight | |
|---|---|---|---|---|---|
| January | −3.2°C | 8.2°C | 23 mm | 9.7 h | ❄ |
| February | −1.9°C | 10.7°C | 24 mm | 10.6 h | ❄ |
| March | 1.6°C | 16.2°C | 17 mm | 11.7 h | ❄ |
| April | 5.1°C | 20.8°C | 12 mm | 13.0 h | ❄ |
| May | 10.4°C | 26.8°C | 10 mm | 14.0 h | |
| June | 16.6°C | 34.0°C | 5 mm | 14.5 h | |
| July | 20.8°C | 35.7°C | 27 mm | 14.3 h | |
| August | 19.4°C | 33.9°C | 29 mm | 13.4 h | |
| September | 14.8°C | 29.8°C | 20 mm | 12.2 h | |
| October | 7.4°C | 21.9°C | 22 mm | 11.0 h | |
| November | 1.0°C | 14.2°C | 15 mm | 10.0 h | ❄ |
| December | −3.3°C | 7.7°C | 22 mm | 9.5 h | ❄ |