Weather in Mercer Island, Washington, United States

7-Day Detailed Weather Forecast for Mercer Island

Tonight

Temperature: 48°F

Wind Speed: 5 mph

Wind Direction: S

Forecast: Mostly cloudy. Low around 48, with temperatures rising to around 50 overnight. South wind around 5 mph.

Saturday

Temperature: 56°F

Wind Speed: 3 mph

Wind Direction: S

Forecast: Mostly sunny. High near 56, with temperatures falling to around 54 in the afternoon. South wind around 3 mph.

Saturday Night

Temperature: 49°F

Wind Speed: 3 to 7 mph

Wind Direction: SSE

Forecast: Rain after 10pm. Mostly cloudy, with a low around 49. South southeast wind 3 to 7 mph. Chance of precipitation is 80%. New rainfall amounts less than a tenth of an inch possible.

Sunday

Temperature: 55°F

Wind Speed: 8 mph

Wind Direction: S

Forecast: Rain. Cloudy, with a high near 55. South wind around 8 mph. Chance of precipitation is 80%. New rainfall amounts less than a tenth of an inch possible.

Sunday Night

Temperature: 51°F

Wind Speed: 5 to 10 mph

Wind Direction: S

Forecast: Rain. Cloudy, with a low around 51. South wind 5 to 10 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

Monday

Temperature: 59°F

Wind Speed: 10 to 15 mph

Wind Direction: S

Forecast: Rain. Cloudy, with a high near 59. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

Monday Night

Temperature: 48°F

Wind Speed: 10 to 14 mph

Wind Direction: SSW

Forecast: Rain. Cloudy, with a low around 48.

Tuesday

Temperature: 54°F

Wind Speed: 13 mph

Wind Direction: S

Forecast: Rain. Cloudy, with a high near 54.

Tuesday Night

Temperature: 41°F

Wind Speed: 14 mph

Wind Direction: SSW

Forecast: Rain. Cloudy, with a low around 41.

Wednesday

Temperature: 47°F

Wind Speed: 12 mph

Wind Direction: SSW

Forecast: Rain. Cloudy, with a high near 47.

Wednesday Night

Temperature: 42°F

Wind Speed: 10 mph

Wind Direction: S

Forecast: Rain. Cloudy, with a low around 42.

Thursday

Temperature: 49°F

Wind Speed: 9 mph

Wind Direction: S

Forecast: Rain. Cloudy, with a high near 49.

Thursday Night

Temperature: 42°F

Wind Speed: 10 mph

Wind Direction: S

Forecast: Rain. Cloudy, with a low around 42.

Friday

Temperature: 49°F

Wind Speed: 9 mph

Wind Direction: S

Forecast: Rain before 5pm. Cloudy, with a high near 49.