Cotulla Weather in September

The climate in Cotulla during September can be summarized as hot and a little damp.

September is in the fall / autumn in Cotulla and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a warm 33°C (92°F), whilst at night 21°C (70°F) is normal.

On average September is the wettest month of the year in Cotulla with around 91mm 3.6 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 6 days, although this may vary considerably.

On the flip side this corresponds to an average of 7.5 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 Cotulla in September 2025.