Mercer Island, Washington | 10-Day Weather Forecasts & Weekend Weather | WeatherBug
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10 Day Forecast
  • Forecast night icon
    Night
    Mostly Clear
    56°
    Friday 5/10
    Forecast night icon
    56°
    Mostly Clear
    Hourly
    Night Details
    Mostly clear. Lows in the lower to mid 50s. North wind to 10 mph.
  • Forecast day icon
    Saturday
    Sunny
    79°
    Forecast night icon
    Night
    Mostly Clear
    56°
    Saturday 5/11
    Day
    79°
    Sunny
    Forecast day icon
    Night
    56°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Sunny. Highs in the mid 70s to lower 80s. Light wind becoming northwest around 10 mph in the afternoon.
    Night Details
    Mostly clear. Lows in the lower to mid 50s. North wind to 10 mph in the evening becoming light.
  • Forecast day icon
    Sunday
    Sunny
    73°
    Forecast night icon
    Night
    Partly Cloudy
    55°
    Sunday 5/12
    Day
    73°
    Sunny
    Forecast day icon
    Night
    55°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Sunny. Highs in the lower to mid 70s. South wind to 10 mph becoming southwest around 10 mph in the afternoon.
    Night Details
    Partly cloudy in the evening then becoming mostly cloudy. Lows in the lower to mid 50s. Southwest wind 10 to 15 mph becoming south after midnight.
  • Forecast day icon
    Monday
    Mostly Cloudy
    59°
    Forecast night icon
    Night
    Partly Cloudy
    50°
    Monday 5/13
    Day
    59°
    Mostly Cloudy
    Forecast day icon
    Night
    50°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Mostly cloudy. Highs in the lower to mid 60s.
    Night Details
    Mostly cloudy in the evening then becoming partly cloudy. Lows in the upper 40s.
  • Forecast day icon
    Tuesday
    Mostly Sunny
    66°
    Forecast night icon
    Night
    Mostly Clear
    51°
    Tuesday 5/14
    Day
    66°
    Mostly Sunny
    Forecast day icon
    Night
    51°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny. Highs near 70.
    Night Details
    Mostly clear. Lows near 50.
  • Forecast day icon
    Wednesday
    Chance of Rain Showers
    67°
    Forecast night icon
    Night
    Chance of Rain Showers
    49°
    Wednesday 5/15
    Day
    67°
    Chance of Rain Showers
    Forecast day icon
    Night
    49°
    Chance of Rain Showers
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny. A slight chance of showers in the afternoon. Highs in the lower to mid 70s.
    Night Details
    Partly cloudy. A slight chance of showers in the evening. Lows in the lower 50s.
  • Forecast day icon
    Thursday
    Chance of Rain Showers
    61°
    Forecast night icon
    Night
    Mostly Clear
    55°
    Thursday 5/16
    Day
    61°
    Chance of Rain Showers
    Forecast day icon
    Night
    55°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny with a slight chance of showers. Highs near 70.
    Night Details
    Mostly clear. Lows in the lower 50s.
  • Forecast day icon
    Friday
    Sunny
    75°
    Forecast night icon
    Night
    Clear
    56°
    Friday 5/17
    Day
    75°
    Sunny
    Forecast day icon
    Night
    56°
    Clear
    Forecast night icon
    Day Details
    Sunny. Highs in the lower to mid 70s.
    Night Details
    Clear. Low temperature around 56F. Dew point will be around 50F with an average humidity of 64%. Winds will be 3 mph from the N.
  • Forecast day icon
    Saturday
    Sunny
    75°
    Forecast night icon
    Night
    Clear
    55°
    Saturday 5/18
    Day
    75°
    Sunny
    Forecast day icon
    Night
    55°
    Clear
    Forecast night icon
    Day Details
    Sunny. High temperature around 75F. Dew point will be around 50F with an average humidity of 53%. Winds will be 2 mph from the NW.
    Night Details
    Clear. Low temperature around 55F. Dew point will be around 47F with an average humidity of 60%. Winds will be 2 mph from the SE.
  • Forecast day icon
    Sunday
    Sunny
    72°
    Forecast night icon
    Night
    30% Chance of Rain
    53°
    Sunday 5/19
    Day
    72°
    Sunny
    Forecast day icon
    Night
    53°
    30% Chance of Rain
    Forecast night icon
    Day Details
    Sunny. High temperature around 72F. Dew point will be around 49F with an average humidity of 55%. Winds will be 3 mph from the W.
    Night Details
    Clear with a slight chance of rain. Chance of precipitation 25%. Low temperature around 53F. Dew point will be around 48F with an average humidity of 64%. Winds will be 2 mph from the S.