Mercer Island, Washington | 10-Day Weather Forecasts & Weekend Weather | WeatherBug
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10 Day Forecast
  • Forecast day icon
    Saturday
    Chance of Rain
    59°
    Forecast night icon
    Night
    Chance of Rain
    49°
    Saturday 5/4
    Day
    59°
    Chance of Rain
    Forecast day icon
    Night
    49°
    Chance of Rain
    Forecast night icon
    Hourly
    Day Details
    Cloudy with a chance of rain in the morning then cloudy with rain likely in the afternoon. Rainfall amounts a tenth to a quarter of an inch possible. Highs in the mid 50s to lower 60s. North wind 10 to 15 mph becoming southwest in the afternoon.
    Night Details
    Cloudy. Rain likely in the evening then a chance of rain after midnight. Rainfall amounts less than a tenth of an inch likely. Lows in the mid to upper 40s. Southwest wind 10 to 15 mph becoming south after midnight. Gusts to 25 mph.
  • Forecast day icon
    Sunday
    Rain
    53°
    Forecast night icon
    Night
    Rain
    47°
    Sunday 5/5
    Day
    53°
    Rain
    Forecast day icon
    Night
    47°
    Rain
    Forecast night icon
    Hourly
    Day Details
    Rain likely. Rainfall amounts a quarter to a half inch possible. Highs in the lower to mid 50s. South wind 10 to 15 mph with gusts to 25 mph.
    Night Details
    Rain at times. Rainfall amounts a tenth to a quarter of an inch possible. Lows in the mid to upper 40s. Southwest wind 10 to 20 mph becoming south after midnight.
  • 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. Rainfall amounts a tenth to a quarter of an inch possible except higher amounts possible in thunderstorms. Highs in the mid to upper 50s. Southwest wind 10 to 15 mph becoming west in the afternoon.
    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 40s.
  • Forecast day icon
    Tuesday
    Chance of Rain
    57°
    Forecast night icon
    Night
    Chance of Rain
    43°
    Tuesday 5/7
    Day
    57°
    Chance of Rain
    Forecast day icon
    Night
    43°
    Chance of Rain
    Forecast night icon
    Hourly
    Day Details
    Mostly cloudy with a chance of rain. Highs in the upper 50s.
    Night Details
    Partly cloudy. A slight chance of rain in the evening. Lows in the lower 40s.
  • Forecast day icon
    Wednesday
    Mostly Sunny
    59°
    Forecast night icon
    Night
    Mostly Clear
    44°
    Wednesday 5/8
    Day
    59°
    Mostly Sunny
    Forecast day icon
    Night
    44°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny. Highs near 60.
    Night Details
    Mostly clear. Lows in the lower to mid 40s.
  • Forecast day icon
    Thursday
    Sunny
    64°
    Forecast night icon
    Night
    Clear
    49°
    Thursday 5/9
    Day
    64°
    Sunny
    Forecast day icon
    Night
    49°
    Clear
    Forecast night icon
    Hourly
    Day Details
    Sunny. Highs in the mid 60s to lower 70s.
    Night Details
    Clear. Lows in the upper 40s.
  • Forecast day icon
    Friday
    Sunny
    72°
    Forecast night icon
    Night
    Clear
    53°
    Friday 5/10
    Day
    72°
    Sunny
    Forecast day icon
    Night
    53°
    Clear
    Forecast night icon
    Day Details
    Sunny. Highs in the 70s.
    Night Details
    Clear. Low temperature around 53F. Dew point will be around 47F with an average humidity of 71%. Winds will be 3 mph from the N.
  • Forecast day icon
    Saturday
    Sunny
    73°
    Forecast night icon
    Night
    Clear
    51°
    Saturday 5/11
    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 46F with an average humidity of 68%. Winds will be 2 mph from the SE.
  • Forecast day icon
    Sunday
    Sunny
    71°
    Forecast night icon
    Night
    Mostly Clear
    50°
    Sunday 5/12
    Day
    71°
    Sunny
    Forecast day icon
    Night
    50°
    Mostly Clear
    Forecast night icon
    Day Details
    Sunny. High temperature around 71F. Dew point will be around 45F with an average humidity of 51%. Winds will be 3 mph from the W.
    Night Details
    Mostly clear. Low temperature around 50F. Dew point will be around 45F with an average humidity of 66%. Winds will be 1 mph from the SE.
  • Forecast day icon
    Monday
    Mostly Sunny
    69°
    Forecast night icon
    Night
    Clear
    49°
    Monday 5/13
    Day
    69°
    Mostly Sunny
    Forecast day icon
    Night
    49°
    Clear
    Forecast night icon
    Day Details
    Mostly sunny. High temperature around 69F. Dew point will be around 45F with an average humidity of 54%. Winds will be 3 mph from the W.
    Night Details
    Clear. Low temperature around 49F. Dew point will be around 45F with an average humidity of 68%. Winds will be 2 mph from the NW.