Olympic National Park (WA) Weather & Climate: Best Time to Visit

Depending on the time of the year, temperatures range from pleasant to chilly in Olympic National Park. Average daytime temperatures reach a pleasant 19°C (66°F) in July. In December, the coolest month of the year, temperatures drop to a chilly 2°C (36°F).

At night, temperatures range from around 9°C (48°F) in July to -3°C (27°F) in December.

Check out our detailed temperature page for more information.

Temperature ranges by month

Olympic National Park has a relatively rain/snowy climate with high precipitation levels, averaging 1802 mm (71 in) of rain/snowfall annually. Olympic National Park can be quite wet during November, receiving approximately 327 mm (13 in) of precipitation over 24 rainy days.

In contrast, during the driest month (July), you will experience much drier conditions, with 15 mm (0.6 in) of precipitation spread across 6 rainy days. For more details, please visit our Olympic National Park Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

Olympic National Park can be enjoyed more throughout the sunniest month of July under a blue sky, with approximately 11.0 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 2.3 hours of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Daily percentage of sunshine

The relative humidity is high throughout the year in Olympic National Park.

The city experiences its highest humidity in January, reaching 78%. In July, the humidity drops to its lowest level at 55%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year