Mercer Island, Washington | 10-Day Weather Forecasts & Weekend Weather | WeatherBug
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10 Day Forecast
  • Forecast day icon
    Wednesday
    Mostly Sunny
    59°
    Forecast night icon
    Night
    Partly Cloudy
    44°
    Wednesday 5/1
    Day
    59°
    Mostly Sunny
    Forecast day icon
    Night
    44°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny. Highs in the mid 50s to lower 60s. South wind around 10 mph becoming southwest in the afternoon.
    Night Details
    Partly cloudy. Lows near 40. Southwest wind to 10 mph in the evening becoming light.
  • Forecast day icon
    Thursday
    Sunny
    61°
    Forecast night icon
    Night
    Clear
    46°
    Thursday 5/2
    Day
    61°
    Sunny
    Forecast day icon
    Night
    46°
    Clear
    Forecast night icon
    Hourly
    Day Details
    Sunny. Highs in the lower to mid 60s. North wind to 10 mph increasing to 10 to 15 mph in the afternoon.
    Night Details
    Clear. Lows in the 40s. Northwest wind to 10 mph becoming southeast after midnight.
  • Forecast day icon
    Friday
    Chance of Rain
    65°
    Forecast night icon
    Night
    Rain
    49°
    Friday 5/3
    Day
    65°
    Chance of Rain
    Forecast day icon
    Night
    49°
    Rain
    Forecast night icon
    Hourly
    Day Details
    Partly sunny. A chance of rain in the afternoon. Highs in the 60s. South wind to 10 mph becoming southwest around 10 mph in the afternoon.
    Night Details
    Rain likely. Lows in the upper 40s.
  • Forecast day icon
    Saturday
    Rain
    55°
    Forecast night icon
    Night
    Chance of Rain
    46°
    Saturday 5/4
    Day
    55°
    Rain
    Forecast day icon
    Night
    46°
    Chance of Rain
    Forecast night icon
    Hourly
    Day Details
    Rain likely. Highs in the mid to upper 50s.
    Night Details
    Mostly cloudy with rain likely in the evening then mostly cloudy with a chance of rain after midnight. Lows in the mid to upper 40s.
  • Forecast day icon
    Sunday
    Chance of Rain
    52°
    Forecast night icon
    Night
    Rain
    47°
    Sunday 5/5
    Day
    52°
    Chance of Rain
    Forecast day icon
    Night
    47°
    Rain
    Forecast night icon
    Hourly
    Day Details
    Mostly cloudy with a chance of rain. Highs in the mid to upper 50s.
    Night Details
    Rain likely. Lows in the mid to upper 40s.
  • Forecast day icon
    Monday
    Rain
    52°
    Forecast night icon
    Night
    Chance of Rain
    45°
    Monday 5/6
    Day
    52°
    Rain
    Forecast day icon
    Night
    45°
    Chance of Rain
    Forecast night icon
    Hourly
    Day Details
    Rain likely in the morning then rain at times in the afternoon. Highs in the mid to upper 50s.
    Night Details
    Mostly cloudy with rain likely in the evening then mostly cloudy with a chance of rain after midnight. Lows in the lower to mid 40s.
  • Forecast day icon
    Tuesday
    Chance of Rain
    54°
    Forecast night icon
    Night
    70% Chance of Rain
    43°
    Tuesday 5/7
    Day
    54°
    Chance of Rain
    Forecast day icon
    Night
    43°
    70% Chance of Rain
    Forecast night icon
    Day Details
    Mostly cloudy with a chance of rain in the morning then mostly cloudy with rain likely in the afternoon. Highs in the mid to upper 50s.
    Night Details
    Cloudy with probable rain. Chance of precipitation 65%. Low temperature around 43F. Dew point will be around 42F with an average humidity of 81%. Winds will be 4 mph from the S.
  • Forecast day icon
    Wednesday
    40% Chance of Rain
    56°
    Forecast night icon
    Night
    30% Chance of Rain
    43°
    Wednesday 5/8
    Day
    56°
    40% Chance of Rain
    Forecast day icon
    Night
    43°
    30% Chance of Rain
    Forecast night icon
    Day Details
    Cloudy with a chance of rain. Chance of precipitation 40%. High temperature around 56F. Dew point will be around 41F with an average humidity of 72%. Winds will be 3 mph from the SW.
    Night Details
    Cloudy with a slight chance of rain. Chance of precipitation 25%. Low temperature around 43F. Dew point will be around 41F with an average humidity of 78%. Winds will be 2 mph from the S.
  • Forecast day icon
    Thursday
    Cloudy
    60°
    Forecast night icon
    Night
    Mostly Clear
    45°
    Thursday 5/9
    Day
    60°
    Cloudy
    Forecast day icon
    Night
    45°
    Mostly Clear
    Forecast night icon
    Day Details
    Cloudy. High temperature around 60F. Dew point will be around 42F with an average humidity of 66%. Winds will be 2 mph from the W.
    Night Details
    Mostly clear. Low temperature around 45F. Dew point will be around 43F with an average humidity of 77%. Winds will be 2 mph from the SE.
  • Forecast day icon
    Friday
    Mostly Cloudy
    64°
    Forecast night icon
    Night
    Mostly Clear
    47°
    Friday 5/10
    Day
    64°
    Mostly Cloudy
    Forecast day icon
    Night
    47°
    Mostly Clear
    Forecast night icon
    Day Details
    Mostly cloudy. High temperature around 64F. Dew point will be around 44F with an average humidity of 63%. Winds will be 2 mph from the W.
    Night Details
    Mostly clear. Low temperature around 47F. Dew point will be around 44F with an average humidity of 74%. Winds will be 2 mph from the SE.