Average monthly hours of sunshine in Mercer Island (WA)

The monthly total of sunhours over the year in Mercer Island (Washington State), the United States of America.

• On average, July is the sunniest month with 312 hours of sunshine.
• December has on average the lowest amount of sunshine with 54 hours.
• On average, the total annual amount of sun is 2180 hours.

Weather Forecasts for Mercer Island (WA)

Sat   Apr 27

12°C | 9°C

S 18 km/h

3.8 mm

overcast and rain

hourly forecast

Sun   Apr 28

12°C | 7°C

SW 18 km/h

1.9 mm

overcast and rain

hourly forecast

Mon   Apr 29

12°C | 5°C

SW 11 km/h

16 mm

broken clouds and rain

hourly forecast

5-Day Forecast 10-Day Forecast