Mount Olympus National Park Weather & Climate: Best Time to Visit

The climate in Mount Olympus National Park is known for significant temperature differences throughout the year, making the weather dynamic. Average daytime temperatures reach a comfortable 28°C (82°F) in August. In January, the coolest month of the year, temperatures drop to a chilly 9°C (48°F).

At night, temperatures range from around 21°C (70°F) in August to 3°C (37°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Mount Olympus National Park has a notably wet climate with abundant precipitation, recording 1098 mm (43 in) of rainfall per year. Mount Olympus National Park can be quite wet during December, receiving approximately 128 mm (5 in) of precipitation over 12 snowy days.

In contrast, during the driest month (August), you will experience much drier conditions, with 51 mm (2 in) of precipitation spread across 6 snowy days days. For more details, please visit our Mount Olympus 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

Mount Olympus National Park can be enjoyed more throughout the sunniest month of July under a blue sky, with approximately 11.2 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 3.4 hours of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

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

The city experiences its highest humidity in December, reaching 83%. In July, the humidity drops to its lowest level at 46%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year