Port Isabel Weather in October

The climate in Port Isabel during October can be summarized as hot, humid and a little damp.

October is in the fall / autumn in Port Isabel and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a muggy 30°C (85°F), whilst at night 19°C (66°F) is normal.

On average October is the 2nd wettest month of the year in Port Isabel with around 83mm 3.2 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 7.8 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 Port Isabel in October 2025.