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Best Time for Arizona Route 66: Kingman to Flagstaff
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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
- This four- or five-day Arizona Route 66 baseline is not generated from November through February. Snow, ice and temporary closures on the high-country approaches require live road information and a winter-specific plan that this catalogue does not hold.
- These cooler shoulder months suit the open high-desert road, but check AZ 511 before every leg and follow signed closures or detours.
- Summer heat is strongest around Kingman and the western SR 66 section. Start driving early, carry water, refuel before the rural stretch and check AZ 511 for incidents and closures.
| Month | Low | High | Rain | Daylight | |
|---|---|---|---|---|---|
| January | −2.8°C | 9.8°C | 36 mm | 9.9 h | ❄ |
| February | −1.9°C | 11.4°C | 38 mm | 10.7 h | ❄ |
| March | 1.2°C | 16.2°C | 25 mm | 11.7 h | ❄ |
| April | 4.2°C | 20.1°C | 15 mm | 12.9 h | |
| May | 9.3°C | 25.6°C | 10 mm | 13.9 h | |
| June | 15.2°C | 32.2°C | 4 mm | 14.4 h | |
| July | 18.6°C | 33.1°C | 54 mm | 14.2 h | |
| August | 17.6°C | 31.8°C | 53 mm | 13.3 h | |
| September | 13.8°C | 28.8°C | 30 mm | 12.2 h | |
| October | 7.0°C | 22.0°C | 26 mm | 11.1 h | |
| November | 1.2°C | 15.2°C | 26 mm | 10.1 h | ❄ |
| December | −3.0°C | 9.1°C | 36 mm | 9.6 h | ❄ |