Bonham Weather in September

The climate in Bonham during September can be summarized as hot and wet.

September is in the fall / autumn in Bonham and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a comfortable 30°C (86°F), whilst at night 18°C (64°F) is normal.

On average September is the 2nd wettest month of the year in Bonham with around 122mm 4.8 inches of rain making it a wet 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 8.8 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 Bonham in September 2025.