Click on a day for an hourly weather forecast
The weather in Hermosillo in September is very hot. The average temperatures are between 26°C and 36°C, drinking water regularly is advisable.
You can expect about 3 to 8 days of rain in Hermosillo 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 Hermosillo in September 2026.
If you’re planning to visit Hermosillo in the near future, we highly recommend that you review the 14 day weather forecast for Hermosillo before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 24° / 12° | 1 | 30 | 0 | 17 mm | Perfect | Hermosillo in January |
| February | 25° / 13° | 0 | 28 | 0 | 12 mm | Perfect | Hermosillo in February |
| March | 29° / 15° | 0 | 31 | 0 | 8 mm | Good | Hermosillo in March |
| April | 32° / 18° | 0 | 30 | 0 | 2 mm | Good | Hermosillo in April |
| May | 35° / 20° | 0 | 31 | 0 | 1 mm | Ok | Hermosillo in May |
| June | 39° / 26° | 0 | 30 | 0 | 15 mm | Bad | Hermosillo in June |
| July | 37° / 29° | 6 | 25 | 0 | 154 mm | Ok | Hermosillo in July |
| August | 37° / 28° | 8 | 23 | 0 | 155 mm | Bad | Hermosillo in August |
| September | 36° / 26° | 5 | 25 | 0 | 113 mm | Ok | Hermosillo in September |
| October | 33° / 22° | 1 | 30 | 0 | 28 mm | Good | Hermosillo in October |
| November | 28° / 17° | 1 | 29 | 0 | 20 mm | Perfect | Hermosillo in November |
| December | 23° / 13° | 1 | 30 | 0 | 16 mm | Perfect | Hermosillo in December |