Rio Grande City Weather in August

The climate in Rio Grande City during August can be summarized as very hot and reasonably dry.

August is in the summer in Rio Grande City and is typically the warmest month of the year. Daytime maximum temperatures average around a hot 37°C (98°F), whilst at night 24°C (74°F) is normal.

On average August is the 5th wettest month of the year in Rio Grande City with around 46mm 1.8 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 8.7 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 Rio Grande City in August 2025.