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.


