Click on a day for an hourly weather forecast
The temperatures in Arizona during September are extremely high, between 28°C and hot as 37°C, drinking water regularly is advisable.
You can expect about 3 to 8 days of rain in Arizona during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Arizona in September 2025.
If you’re planning to visit Arizona in the near future, we highly recommend that you review the 14 day weather forecast for Arizona before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 19° / 9° | 1 | 30 | 0 | 34 mm | Good | Arizona in January |
| February | 21° / 11° | 2 | 26 | 0 | 31 mm | Good | Arizona in February |
| March | 25° / 14° | 1 | 30 | 0 | 24 mm | Perfect | Arizona in March |
| April | 29° / 18° | 1 | 29 | 0 | 9 mm | Good | Arizona in April |
| May | 33° / 21° | 0 | 31 | 0 | 4 mm | Good | Arizona in May |
| June | 39° / 27° | 0 | 30 | 0 | 6 mm | Bad | Arizona in June |
| July | 39° / 30° | 4 | 27 | 0 | 64 mm | Bad | Arizona in July |
| August | 39° / 30° | 3 | 28 | 0 | 54 mm | Bad | Arizona in August |
| September | 37° / 28° | 3 | 27 | 0 | 54 mm | Ok | Arizona in September |
| October | 31° / 21° | 2 | 29 | 0 | 27 mm | Good | Arizona in October |
| November | 25° / 15° | 1 | 29 | 0 | 23 mm | Perfect | Arizona in November |
| December | 18° / 10° | 2 | 29 | 0 | 37 mm | Good | Arizona in December |