Average Monthly Sunshine in Issaquah (WA)

The graphs on this page shows the average number of hours per month and per day that Issaquah receives direct sunlight. The numbers are calculated over a 30-year period to provide a reliable average.

Monthly hours of sunshine

Seasonal sunshine in Issaquah varies. It peaks at 312 hours in July and drops to 54 hours in December. The total annual amount of sun is 2180 hours.

Daily hours of sunshine

Seasonal changes in sunshine hours are quite obvious in Issaquah. While July receives considerable daily sunshine with up to 10.4 hours, December marks the darkest time of the year, where sunshine is scarce with only 1.8 hours of sunlight per day.

Issaquah’s total hours of sunshine compared to other major cities

Issaquah enjoys an average of 2180 hours of sunshine annually. Let’s compare this with some popular tourist destinations:

Athens, Greece, enjoys 2769 hours of sunshine each year, making it one of the sunniest destinations in the Mediterranean region.

In contrast, London, UK, receives only about 1659 hours of sunshine per year, known for its frequently overcast and rainy skies.

Beijing, China, has 2505 hours of sunshine annually, with clear, sunny days in winter.

Melbourne, Australia, has 2380 hours of sunshine annually, with its famous “four seasons in a day” weather pattern.

Other climate information

November, Issaquah’s wettest month, receives 25 mm of rainfall and has a maximum daytime temperature of 9°C. During the driest month July you can expect a temperature of 24°C.

For more detailed insights into the city’s temperatures, check out our Temperature page. To explore more about precipitation patterns, visit our Issaquah Precipitation page.