Mercer Island, Washington | 10-Day Weather Forecasts & Weekend Weather | WeatherBug
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10 Day Forecast
  • Forecast night icon
    Night
    Mostly Clear
    47°
    Sunday 5/19
    Forecast night icon
    47°
    Mostly Clear
    Hourly
    Night Details
    Mostly clear. Lows in the 40s. West wind to 10 mph becoming south after midnight.
  • Forecast day icon
    Monday
    Mostly Sunny
    63°
    Forecast night icon
    Night
    Chance of Rain Showers
    49°
    Monday 5/20
    Day
    63°
    Mostly Sunny
    Forecast day icon
    Night
    49°
    Chance of Rain Showers
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny. Highs in the 60s. Light wind.
    Night Details
    Mostly cloudy. A slight chance of showers after midnight. Lows in the mid 40s to lower 50s. West wind to 10 mph becoming south after midnight.
  • Forecast day icon
    Tuesday
    Rain
    54°
    Forecast night icon
    Night
    Chance of Rain Showers
    47°
    Tuesday 5/21
    Day
    54°
    Rain
    Forecast day icon
    Night
    47°
    Chance of Rain Showers
    Forecast night icon
    Hourly
    Day Details
    Rain likely in the morning then rain in the afternoon. Rainfall amounts a quarter to a half inch possible. Highs in the 50s. South wind 10 to 15 mph.
    Night Details
    Cloudy with rain likely in the evening then mostly cloudy with a chance of showers after midnight. Rainfall amounts a quarter to a half inch possible. Lows in the mid to upper 40s. South wind 10 to 15 mph.
  • Forecast day icon
    Wednesday
    Chance of Rain Showers
    57°
    Forecast night icon
    Night
    Chance of Rain Showers
    47°
    Wednesday 5/22
    Day
    57°
    Chance of Rain Showers
    Forecast day icon
    Night
    47°
    Chance of Rain Showers
    Forecast night icon
    Hourly
    Day Details
    Mostly cloudy with a chance of showers. Highs near 60.
    Night Details
    Mostly cloudy. A slight chance of showers in the evening. Lows in the upper 40s.
  • Forecast day icon
    Thursday
    Partly Sunny
    63°
    Forecast night icon
    Night
    Chance of Rain Showers
    51°
    Thursday 5/23
    Day
    63°
    Partly Sunny
    Forecast day icon
    Night
    51°
    Chance of Rain Showers
    Forecast night icon
    Hourly
    Day Details
    Partly sunny. Highs in the mid 60s.
    Night Details
    Partly cloudy in the evening then mostly cloudy with a slight chance of showers after midnight. Lows in the upper 40s.
  • Forecast day icon
    Friday
    Chance of Rain Showers
    58°
    Forecast night icon
    Night
    Chance of Rain Showers
    48°
    Friday 5/24
    Day
    58°
    Chance of Rain Showers
    Forecast day icon
    Night
    48°
    Chance of Rain Showers
    Forecast night icon
    Hourly
    Day Details
    Partly sunny with a chance of showers. Highs in the lower 60s.
    Night Details
    Mostly cloudy. A chance of showers in the evening then a slight chance of showers after midnight. Lows in the mid to upper 40s.
  • Forecast day icon
    Saturday
    Chance of Rain Showers
    57°
    Forecast night icon
    Night
    Chance of Rain Showers
    48°
    Saturday 5/25
    Day
    57°
    Chance of Rain Showers
    Forecast day icon
    Night
    48°
    Chance of Rain Showers
    Forecast night icon
    Hourly
    Day Details
    Partly sunny. A slight chance of showers in the morning then a chance of showers in the afternoon. Highs in the lower 60s.
    Night Details
    Mostly cloudy. A chance of showers in the evening then a slight chance of showers after midnight. Lows in the mid to upper 40s.
  • Forecast day icon
    Sunday
    Chance of Rain Showers
    62°
    Forecast night icon
    Night
    Mostly Cloudy
    50°
    Sunday 5/26
    Day
    62°
    Chance of Rain Showers
    Forecast day icon
    Night
    50°
    Mostly Cloudy
    Forecast night icon
    Day Details
    Partly sunny. A slight chance of showers in the morning then a chance of showers in the afternoon. Highs in the lower to mid 60s.
    Night Details
    Mostly cloudy. Low temperature around 50F. Dew point will be around 47F with an average humidity of 76%. Winds will be 2 mph from the S.
  • Forecast day icon
    Monday
    Sunny
    67°
    Forecast night icon
    Night
    Mostly Clear
    52°
    Monday 5/27
    Day
    67°
    Sunny
    Forecast day icon
    Night
    52°
    Mostly Clear
    Forecast night icon
    Day Details
    Sunny. High temperature around 67F. Dew point will be around 47F with an average humidity of 62%. Winds will be 3 mph from the W.
    Night Details
    Mostly clear. Low temperature around 52F. Dew point will be around 48F with an average humidity of 74%. Winds will be 2 mph from the SE.
  • Forecast day icon
    Tuesday
    Partly Cloudy
    69°
    Forecast night icon
    Night
    30% Chance of Rain
    54°
    Tuesday 5/28
    Day
    69°
    Partly Cloudy
    Forecast day icon
    Night
    54°
    30% Chance of Rain
    Forecast night icon
    Day Details
    Partly cloudy. High temperature around 69F. Dew point will be around 49F with an average humidity of 58%. Winds will be 3 mph from the W.
    Night Details
    Partly cloudy with a slight chance of rain. Chance of precipitation 25%. Low temperature around 54F. Dew point will be around 50F with an average humidity of 72%. Winds will be 2 mph from the S.