Mercer Island, Washington | 10-Day Weather Forecasts & Weekend Weather | WeatherBug
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10 Day Forecast
  • Forecast night icon
    Night
    Mostly Cloudy
    44°
    Tuesday 5/7
    Forecast night icon
    44°
    Mostly Cloudy
    Hourly
    Night Details
    Mostly cloudy in the evening then becoming mostly clear. Lows in the upper 30s to mid 40s. North wind around 10 mph in the evening becoming light.
  • Forecast day icon
    Wednesday
    Partly Sunny
    60°
    Forecast night icon
    Night
    Mostly Clear
    47°
    Wednesday 5/8
    Day
    60°
    Partly Sunny
    Forecast day icon
    Night
    47°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Partly sunny in the morning then becoming sunny. Highs in the upper 50s to mid 60s. Light wind becoming north 10 to 15 mph in the afternoon.
    Night Details
    Mostly clear. Lows in the 40s. North wind 10 to 15 mph with gusts to 25 mph becoming northeast after midnight.
  • Forecast day icon
    Thursday
    Sunny
    70°
    Forecast night icon
    Night
    Clear
    53°
    Thursday 5/9
    Day
    70°
    Sunny
    Forecast day icon
    Night
    53°
    Clear
    Forecast night icon
    Hourly
    Day Details
    Sunny. Highs in the upper 60s to mid 70s. Northeast wind around 10 mph becoming north with gusts to 25 mph in the afternoon.
    Night Details
    Clear. Lows in the lower to mid 50s. North wind 10 to 15 mph with gusts to 25 mph becoming northeast after midnight.
  • Forecast day icon
    Friday
    Sunny
    78°
    Forecast night icon
    Night
    Clear
    55°
    Friday 5/10
    Day
    78°
    Sunny
    Forecast day icon
    Night
    55°
    Clear
    Forecast night icon
    Hourly
    Day Details
    Sunny. Highs near 80.
    Night Details
    Clear. Lows in the lower to mid 50s.
  • Forecast day icon
    Saturday
    Sunny
    79°
    Forecast night icon
    Night
    Mostly Clear
    54°
    Saturday 5/11
    Day
    79°
    Sunny
    Forecast day icon
    Night
    54°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Sunny. Highs in the lower to mid 80s.
    Night Details
    Mostly clear. Lows in the lower to mid 50s.
  • Forecast day icon
    Sunday
    Mostly Sunny
    71°
    Forecast night icon
    Night
    Partly Cloudy
    51°
    Sunday 5/12
    Day
    71°
    Mostly Sunny
    Forecast day icon
    Night
    51°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny. Highs in the lower to mid 70s.
    Night Details
    Partly cloudy. Lows in the lower 50s.
  • Forecast day icon
    Monday
    Partly Sunny
    60°
    Forecast night icon
    Night
    Partly Cloudy
    49°
    Monday 5/13
    Day
    60°
    Partly Sunny
    Forecast day icon
    Night
    49°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Partly sunny. Highs in the upper 60s.
    Night Details
    Partly cloudy in the evening then becoming mostly cloudy. Lows near 50.
  • Forecast day icon
    Tuesday
    Partly Sunny
    59°
    Forecast night icon
    Night
    Partly Cloudy
    47°
    Tuesday 5/14
    Day
    59°
    Partly Sunny
    Forecast day icon
    Night
    47°
    Partly Cloudy
    Forecast night icon
    Day Details
    Partly sunny. Highs in the mid to upper 60s.
    Night Details
    Partly cloudy. Low temperature around 47F. Dew point will be around 43F with an average humidity of 72%. Winds will be 2 mph from the S.
  • Forecast day icon
    Wednesday
    Partly Cloudy
    62°
    Forecast night icon
    Night
    Mostly Cloudy
    49°
    Wednesday 5/15
    Day
    62°
    Partly Cloudy
    Forecast day icon
    Night
    49°
    Mostly Cloudy
    Forecast night icon
    Day Details
    Partly cloudy. High temperature around 62F. Dew point will be around 44F with an average humidity of 65%. Winds will be 2 mph from the W.
    Night Details
    Mostly cloudy. Low temperature around 49F. Dew point will be around 44F with an average humidity of 71%. Winds will be 1 mph from the NW.
  • Forecast day icon
    Thursday
    30% Chance of Rain
    60°
    Forecast night icon
    Night
    Mostly Clear
    46°
    Thursday 5/16
    Day
    60°
    30% Chance of Rain
    Forecast day icon
    Night
    46°
    Mostly Clear
    Forecast night icon
    Day Details
    Mostly cloudy with a slight chance of rain. Chance of precipitation 25%. High temperature around 60F. Dew point will be around 45F with an average humidity of 67%. Winds will be 2 mph from the W.
    Night Details
    Mostly clear. Low temperature around 46F. Dew point will be around 43F with an average humidity of 72%. Winds will be 1 mph from the SE.