Seattle Weather in August

The climate in Seattle during August can be summarized as warm and reasonably dry.

August is in the summer in Seattle and is typically the warmest month of the year. Daytime maximum temperatures average around a comfortable 24°C (75°F), whilst at night 13°C (56°F) is normal.

On average August is the 2nd driest month of the year in Seattle with around 31mm 1.2 inches of rain making it a reasonably 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 9.8 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 Seattle in August 2024.