Olympic National Park (WA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Olympic National Park.
Climate overview of Olympic National Park
Olympic National Park, Washington State, United States of America, experiences significant temperature variation throughout the year. Summers bring daytime highs of 19°C (66°F) in July, while winters cool to 2°C (36°F) in December.
With around 1802 mm (71 in) of annual rain/snowfall, Olympic National Park has a notably wet climate. However, this rain/snowfall is not evenly distributed — the city has distinct dry (June to August) and wet (November to March) seasons, with pleasant summers and cold winters. The wettest month is November. The sunniest month is July, with 11.0 hours of sunshine per day on average.
Olympic National Park Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Olympic National Park - and find the best time to visit.
Monthly Temperature in Olympic National Park
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
Rainfall in Olympic National Park
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
Sunshine Hours in Olympic National Park
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
Humidity in Olympic National Park by Month
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
Best Time to Visit Olympic National Park
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: July and August
- Warmest weather: July and August
- Most sunshine: July
- Fewest rainy days: July and August
- Wettest months: January, February, March, November and December, when rainfall is highest.
- Seasonal pattern: Distinct dry (June to August) and wet (November to March) seasons, with pleasant summers and cold winters
- Coldest conditions: December, with freezing nights around -3°C (27°F).
Frequently asked questions about the climate in Olympic National Park
What is the best time to visit Olympic National Park?
July and August typically offer the most optimal weather in Olympic National Park. In contrast, January, February, March, April, October, November and December tend to have less optimal conditions. Olympic National Park has distinct dry (June to August) and wet (November to March) seasons, with pleasant summers and cold winters.
What temperatures can I expect in Olympic National Park?
Daytime highs range from 2°C (36°F) in December to 19°C (66°F) in July. Nighttime lows range from -3°C (27°F) to 9°C (48°F). Temperatures vary considerably through the year.
How much rain does Olympic National Park get?
Annual rainfall is around 1802 mm (71 in). November is the wettest month with 327 mm (13 in), while July is the driest with 15 mm (0.6 in).
How sunny is Olympic National Park?
Olympic National Park receives around 2,220 hours of sunshine per year. July is the sunniest month with 330 hours, while December is the cloudiest with just 70 hours. Overall, Olympic National Park enjoys abundant sunshine.
Olympic National Park 3-Day Forecast
Olympic National Park (WA) 3-Day Forecast
Olympic National Park on the map
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