Arizona weather in October
October splits Arizona wide open: Phoenix runs 89° afternoons while Flagstaff sees real snow.
Based on 5 weather stations. Five stations from the desert floor to seven thousand feet — Arizona is really two climates stacked a mile apart, and the rows below keep them separate.
The Desert
Highs 86–89°, nights 59–66°, and 0.6–0.7 in of rain in a typical October.
Red Rock Country
Highs near 79°, nights around 51°, and 1.4 in of rain in a typical October.
| Place | Highs / lows | Wet days | The short version |
|---|---|---|---|
| Sedona | 79° / 51° | 3 | Cottonwood gold in the canyon, perfect air on the trails. |
High Country
Highs 64–65°, nights 32–33°, and 1.2–1.5 in of rain in a typical October.
| Place | Highs / lows | Wet days | Snow | The short version |
|---|---|---|---|---|
| Flagstaff | 64° / 32° | 3 | 1.5 in | Crisp and clear, then cold the moment the sun drops. |
| Grand Canyon | 65° / 33° | 3 | 1.1 in | Gold on the rim, frost at dawn, crowds thinning. |
Each place above has its own page for the full story — what the month feels like, what to pack, and whether the timing is right.