Mercer Island, Washington | 10-Day Weather Forecasts & Weekend Weather | WeatherBug
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10 Day Forecast
  • Forecast day icon
    Tuesday
    Sunny
    67°
    Forecast night icon
    Night
    Partly Cloudy
    53°
    Tuesday 5/14
    Day
    67°
    Sunny
    Forecast day icon
    Night
    53°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Sunny. Highs in the mid 60s to lower 70s. North wind to 10 mph increasing to 10 to 15 mph in the afternoon.
    Night Details
    Partly cloudy. Lows near 50. North wind 10 to 15 mph becoming northeast after midnight.
  • Forecast day icon
    Wednesday
    Mostly Sunny
    71°
    Forecast night icon
    Night
    Mostly Clear
    54°
    Wednesday 5/15
    Day
    71°
    Mostly Sunny
    Forecast day icon
    Night
    54°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny. Highs in the 70s. North wind to 10 mph increasing to 10 to 15 mph in the afternoon.
    Night Details
    Mostly 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
    Thursday
    Mostly Cloudy
    67°
    Forecast night icon
    Night
    Chance of Rain Showers
    51°
    Thursday 5/16
    Day
    67°
    Mostly Cloudy
    Forecast day icon
    Night
    51°
    Chance of Rain Showers
    Forecast night icon
    Hourly
    Day Details
    Mostly cloudy. Highs in the mid 60s to lower 70s. Light wind becoming southwest 10 to 20 mph with gusts to 30 mph in the afternoon.
    Night Details
    Mostly cloudy with a slight chance of showers. Lows near 50.
  • Forecast day icon
    Friday
    Chance of Rain Showers
    61°
    Forecast night icon
    Night
    Mostly Cloudy
    48°
    Friday 5/17
    Day
    61°
    Chance of Rain Showers
    Forecast day icon
    Night
    48°
    Mostly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Partly sunny with a slight chance of showers. Highs in the lower to mid 60s.
    Night Details
    Mostly cloudy. Lows in the mid to upper 40s.
  • Forecast day icon
    Saturday
    Partly Sunny
    64°
    Forecast night icon
    Night
    Mostly Cloudy
    49°
    Saturday 5/18
    Day
    64°
    Partly Sunny
    Forecast day icon
    Night
    49°
    Mostly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Partly sunny. Highs in the mid to upper 60s.
    Night Details
    Mostly cloudy. Lows in the mid to upper 40s.
  • Forecast day icon
    Sunday
    Mostly Sunny
    61°
    Forecast night icon
    Night
    Partly Cloudy
    46°
    Sunday 5/19
    Day
    61°
    Mostly Sunny
    Forecast day icon
    Night
    46°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny. Highs near 70.
    Night Details
    Partly cloudy. Lows in the upper 40s.
  • Forecast day icon
    Monday
    Partly Sunny
    58°
    Forecast night icon
    Night
    Mostly Cloudy
    48°
    Monday 5/20
    Day
    58°
    Partly Sunny
    Forecast day icon
    Night
    48°
    Mostly Cloudy
    Forecast night icon
    Day Details
    Partly sunny. Highs in the mid 60s.
    Night Details
    Mostly cloudy. Low temperature around 48F. Dew point will be around 44F with an average humidity of 72%. Winds will be 3 mph from the W.
  • Forecast day icon
    Tuesday
    40% Chance of Rain
    60°
    Forecast night icon
    Night
    30% Chance of Rain
    50°
    Tuesday 5/21
    Day
    60°
    40% Chance of Rain
    Forecast day icon
    Night
    50°
    30% Chance of Rain
    Forecast night icon
    Day Details
    Cloudy with a chance of rain. Chance of precipitation 35%. High temperature around 60F. Dew point will be around 46F with an average humidity of 68%. Winds will be 2 mph from the SW.
    Night Details
    Cloudy with a slight chance of rain. Chance of precipitation 30%. Low temperature around 50F. Dew point will be around 45F with an average humidity of 73%. Winds will be 2 mph from the SE.
  • Forecast day icon
    Wednesday
    40% Chance of Rain
    60°
    Forecast night icon
    Night
    40% Chance of Rain
    51°
    Wednesday 5/22
    Day
    60°
    40% Chance of Rain
    Forecast day icon
    Night
    51°
    40% Chance of Rain
    Forecast night icon
    Day Details
    Cloudy with a chance of rain. Chance of precipitation 40%. High temperature around 60F. Dew point will be around 47F with an average humidity of 69%. Winds will be 2 mph from the NW.
    Night Details
    Cloudy with a chance of rain. Chance of precipitation 35%. Low temperature around 51F. Dew point will be around 46F with an average humidity of 72%. Winds will be 2 mph from the SE.
  • Forecast day icon
    Thursday
    30% Chance of Rain
    62°
    Forecast night icon
    Night
    Cloudy
    52°
    Thursday 5/23
    Day
    62°
    30% Chance of Rain
    Forecast day icon
    Night
    52°
    Cloudy
    Forecast night icon
    Day Details
    Cloudy with a slight chance of rain. Chance of precipitation 30%. High temperature around 62F. Dew point will be around 47F with an average humidity of 67%. Winds will be 2 mph from the NW.
    Night Details
    Cloudy. Low temperature around 52F. Dew point will be around 47F with an average humidity of 73%. Winds will be 2 mph from the SE.