10-Day Weather Forecast - Mercer Island, WA

Mostly cloudy in the morning then becoming sunny. Highs in the mid 70s to lower 80s. Light wind.

Mostly clear in the evening then becoming mostly cloudy. Lows in the mid to upper 50s. Light wind.

Mostly cloudy. Highs in the 70s. Light wind.

Mostly cloudy. Lows in the mid to upper 50s. Light wind.

Partly sunny. Highs in the mid 70s.

Partly cloudy. Lows in the lower to mid 50s.

Mostly sunny. Highs in the mid 70s.

Mostly clear. Lows in the lower 50s.

Mostly sunny. Highs near 80.

Mostly clear. Lows in the mid 50s.

Sunny. Highs in the lower to mid 80s.

Mostly clear. Lows in the mid to upper 50s.

Mostly sunny. Highs in the lower 80s.

Clear. Low temperature around 57F. Dew point will be around 53F with an average humidity of 70%. Winds will be 1 mph from the NW.

Sunny. High temperature around 78F. Dew point will be around 53F with an average humidity of 58%. Winds will be 2 mph from the N.

Clear. Low temperature around 55F. Dew point will be around 52F with an average humidity of 72%. Winds will be 2 mph from the NE.

Sunny. High temperature around 82F. Dew point will be around 53F with an average humidity of 54%. Winds will be 3 mph from the N.

Clear. Low temperature around 57F. Dew point will be around 52F with an average humidity of 67%. Winds will be 1 mph from the N.