Los Mochis Weather in September

The climate in Los Mochis during September can be summarized as very hot, humid and reasonably dry.

September is in the fall / autumn in Los Mochis and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a steamy 35°C (96°F), whilst at night 23°C (74°F) is normal.

On average September is the 2nd wettest month of the year in Los Mochis with around 77mm 3 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 7 days, although this may vary considerably.

On the flip side this corresponds to an average of 7.7 hours of sunshine per day.

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Los Mochis in September 2025.