Mercer Island, Washington | 10-Day Weather Forecasts & Weekend Weather | WeatherBug
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10 Day Forecast
  • Forecast day icon
    Friday
    Mostly Sunny
    65°
    Forecast night icon
    Night
    Chance of Rain
    50°
    Friday 5/3
    Day
    65°
    Mostly Sunny
    Forecast day icon
    Night
    50°
    Chance of Rain
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny in the morning then becoming mostly cloudy. Highs in the mid 60s to lower 70s. Light wind becoming southwest around 10 mph in the afternoon.
    Night Details
    Cloudy with a chance of rain in the evening then rain likely after midnight. Rainfall amounts a tenth to a quarter of an inch possible. Lows near 50. Southwest wind 10 to 15 mph in the evening becoming light.
  • Forecast day icon
    Saturday
    Rain
    54°
    Forecast night icon
    Night
    Chance of Rain
    47°
    Saturday 5/4
    Day
    54°
    Rain
    Forecast day icon
    Night
    47°
    Chance of Rain
    Forecast night icon
    Hourly
    Day Details
    Rain likely. Rainfall amounts a tenth to a quarter of an inch possible. Highs in the 50s. West wind to 10 mph becoming southwest around 10 mph in the afternoon.
    Night Details
    Cloudy with rain likely in the evening then cloudy with a chance of rain after midnight. Rainfall amounts less than a tenth of an inch likely. Lows in the mid to upper 40s. South wind 10 to 15 mph.
  • Forecast day icon
    Sunday
    Chance of Rain
    54°
    Forecast night icon
    Night
    Rain
    47°
    Sunday 5/5
    Day
    54°
    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 lower to mid 50s. South wind 10 to 20 mph.
    Night Details
    Breezy. Rain likely in the evening then rain at times after midnight. Lows in the mid to upper 40s.
  • Forecast day icon
    Monday
    Chance of Storms
    55°
    Forecast night icon
    Night
    Chance of Storms
    44°
    Monday 5/6
    Day
    55°
    Chance of Storms
    Forecast day icon
    Night
    44°
    Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Rain at times in the morning then showers and a slight chance of thunderstorms in the afternoon. Highs in the mid to upper 50s.
    Night Details
    Mostly cloudy with showers likely and a slight chance of thunderstorms 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
    56°
    Forecast night icon
    Night
    Chance of Rain
    44°
    Tuesday 5/7
    Day
    56°
    Chance of Rain
    Forecast day icon
    Night
    44°
    Chance of Rain
    Forecast night icon
    Hourly
    Day Details
    Mostly cloudy with a chance of rain. Highs in the mid to upper 50s.
    Night Details
    Mostly cloudy. A slight chance of rain in the evening. Lows in the lower to mid 40s.
  • Forecast day icon
    Wednesday
    Chance of Rain
    57°
    Forecast night icon
    Night
    Partly Cloudy
    44°
    Wednesday 5/8
    Day
    57°
    Chance of Rain
    Forecast day icon
    Night
    44°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Partly sunny. A slight chance of rain in the afternoon. Highs near 60.
    Night Details
    Partly cloudy. Lows in the lower to mid 40s.
  • Forecast day icon
    Thursday
    Sunny
    64°
    Forecast night icon
    Night
    Clear
    50°
    Thursday 5/9
    Day
    64°
    Sunny
    Forecast day icon
    Night
    50°
    Clear
    Forecast night icon
    Day Details
    Sunny. Highs in the mid to upper 60s.
    Night Details
    Clear. Low temperature around 50F. Dew point will be around 45F with an average humidity of 73%. Winds will be 4 mph from the N.
  • Forecast day icon
    Friday
    Sunny
    75°
    Forecast night icon
    Night
    Clear
    53°
    Friday 5/10
    Day
    75°
    Sunny
    Forecast day icon
    Night
    53°
    Clear
    Forecast night icon
    Day Details
    Sunny. High temperature around 75F. Dew point will be around 47F with an average humidity of 50%. Winds will be 4 mph from the NW.
    Night Details
    Clear. Low temperature around 53F. Dew point will be around 49F with an average humidity of 69%. Winds will be 3 mph from the E.
  • Forecast day icon
    Saturday
    Sunny
    75°
    Forecast night icon
    Night
    Clear
    52°
    Saturday 5/11
    Day
    75°
    Sunny
    Forecast day icon
    Night
    52°
    Clear
    Forecast night icon
    Day Details
    Sunny. High temperature around 75F. Dew point will be around 49F with an average humidity of 51%. Winds will be 3 mph from the NW.
    Night Details
    Clear. Low temperature around 52F. Dew point will be around 48F with an average humidity of 69%. Winds will be 2 mph from the SE.
  • Forecast day icon
    Sunday
    Sunny
    73°
    Forecast night icon
    Night
    Clear
    51°
    Sunday 5/12
    Day
    73°
    Sunny
    Forecast day icon
    Night
    51°
    Clear
    Forecast night icon
    Day Details
    Sunny. High temperature around 73F. Dew point will be around 47F with an average humidity of 52%. Winds will be 3 mph from the NW.
    Night Details
    Clear. Low temperature around 51F. Dew point will be around 47F with an average humidity of 67%. Winds will be 2 mph from the SE.