Click on a day for an hourly weather forecast
The temperatures in Flagstaff in October are quite cold with temperatures between 6°C and 18°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Flagstaff during the month of October. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Please note that Flagstaff can expect a few days of snow in October.
Our weather forecast can give you a great sense of what weather to expect in Flagstaff in October 2025.
If you’re planning to visit Flagstaff in the near future, we highly recommend that you review the 14 day weather forecast for Flagstaff before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 6° / -3° | 3 | 20 | 8 | 49 mm | Awful | Flagstaff in January |
| February | 7° / -2° | 2 | 19 | 7 | 47 mm | Bad | Flagstaff in February |
| March | 11° / 1° | 2 | 23 | 6 | 43 mm | Bad | Flagstaff in March |
| April | 16° / 4° | 2 | 25 | 3 | 22 mm | Ok | Flagstaff in April |
| May | 20° / 7° | 3 | 27 | 1 | 24 mm | Good | Flagstaff in May |
| June | 27° / 13° | 1 | 29 | 0 | 15 mm | Perfect | Flagstaff in June |
| July | 28° / 16° | 9 | 22 | 0 | 178 mm | Good | Flagstaff in July |
| August | 27° / 16° | 6 | 25 | 0 | 127 mm | Perfect | Flagstaff in August |
| September | 24° / 13° | 4 | 26 | 0 | 56 mm | Perfect | Flagstaff in September |
| October | 18° / 6° | 3 | 28 | 1 | 30 mm | Good | Flagstaff in October |
| November | 12° / 1° | 2 | 25 | 4 | 36 mm | Bad | Flagstaff in November |
| December | 6° / -3° | 3 | 19 | 9 | 57 mm | Awful | Flagstaff in December |