Sitka Weather in August

The climate in Sitka during August can be summarized as mild and wet.

August is in the summer in Sitka and is typically the warmest month of the year. Daytime maximum temperatures average around a cool 15°C (59°F), whilst at night 7°C (45°F) is normal.

On average August is the 5th driest month of the year in Sitka with around 191mm 7.5 inches of rain making it a wet time to visit. This rainfall is typically spread over 18 days, although this may vary considerably.

On the flip side this corresponds to an average of 5.9 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 Sitka in August 2025.