Grantsville Weather in August

The climate in Grantsville during August can be summarized as hot and dry.

August is in the summer in Grantsville and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a comfortable 31°C (88°F), whilst at night 16°C (61°F) is normal.

On average August is the 2nd driest month of the year in Grantsville with around 19mm 0.7 inches of rain making it a dry 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 12 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 Grantsville in August 2025.