Port Lavaca Weather in August

The climate in Port Lavaca during August can be summarized as very hot, humid and a little damp.

August is in the summer in Port Lavaca and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a steamy 34°C (92°F), whilst at night 24°C (75°F) is normal.

On average August is the 5th wettest month of the year in Port Lavaca with around 88mm 3.5 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.

On the flip side this corresponds to an average of 10.1 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 Lavaca in August 2025.