Santiago Miahuatlán Weather in September

The climate in Santiago Miahuatlán during September can be summarized as mild and damp.

September is in the fall / autumn in Santiago Miahuatlán and is typically the 5th warmest month of the year. Daytime maximum temperatures average around 24°C (74°F), whilst at night 11°C (51°F) is normal.

On average September is the 2nd wettest month of the year in Santiago Miahuatlán with around 110mm 4.3 inches of rain making it a damp time to visit. This rainfall is typically spread over 13 days, although this may vary considerably.

On the flip side this corresponds to an average of 5 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 Santiago Miahuatlán in September 2025.