Matamoros Weather in September

The climate in Matamoros during September can be summarized as hot and reasonably dry.

September is in the fall / autumn in Matamoros and is typically the 5th warmest month of the year. Daytime maximum temperatures average around 32°C (90°F), whilst at night 17°C (62°F) is normal.

On average September is the wettest month of the year in Matamoros with around 38mm 1.5 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 4 days, although this may vary considerably.

On the flip side this corresponds to an average of 6.7 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 Matamoros in September 2025.