7-Day Forecast Summary
7-Day Detailed Weather Forecast for Mercer Island
Tonight |
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Temperature: 59°F Wind Speed: 5 to 8 mph Wind Direction: SSW Forecast: Partly cloudy, with a low around 59. South southwest wind 5 to 8 mph. |
Wednesday |
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Temperature: 79°F Wind Speed: 5 mph Wind Direction: SSW Forecast: Mostly sunny, with a high near 79. South southwest wind around 5 mph. |
Wednesday Night |
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Temperature: 59°F Wind Speed: 6 mph Wind Direction: SSW Forecast: Partly cloudy. Low around 59, with temperatures rising to around 61 overnight. South southwest wind around 6 mph. |
Thursday |
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Temperature: 75°F Wind Speed: 8 mph Wind Direction: SSW Forecast: Partly sunny, with a high near 75. South southwest wind around 8 mph. |
Thursday Night |
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Temperature: 57°F Wind Speed: 3 to 8 mph Wind Direction: SW Forecast: Partly cloudy, with a low around 57. Southwest wind 3 to 8 mph. |
Friday |
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Temperature: 74°F Wind Speed: 3 mph Wind Direction: WSW Forecast: Partly sunny, with a high near 74. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible. |
Friday Night |
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Temperature: 56°F Wind Speed: 2 to 6 mph Wind Direction: NNE Forecast: A chance of rain after 11pm. Mostly cloudy, with a low around 56. |
Saturday |
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Temperature: 70°F Wind Speed: 3 mph Wind Direction: SW Forecast: A chance of rain before 5pm. Partly sunny, with a high near 70. |
Saturday Night |
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Temperature: 55°F Wind Speed: 2 mph Wind Direction: WSW Forecast: Mostly cloudy, with a low around 55. |
Sunday |
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Temperature: 71°F Wind Speed: 3 mph Wind Direction: WSW Forecast: Partly sunny, with a high near 71. |
Sunday Night |
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Temperature: 55°F Wind Speed: 3 mph Wind Direction: NNE Forecast: Mostly cloudy, with a low around 55. |
Monday |
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Temperature: 71°F Wind Speed: 5 mph Wind Direction: SW Forecast: Partly sunny, with a high near 71. |
Monday Night |
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Temperature: 56°F Wind Speed: 5 mph Wind Direction: S Forecast: A slight chance of rain after 11pm. Mostly cloudy, with a low around 56. |
Tuesday |
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Temperature: 71°F Wind Speed: 5 mph Wind Direction: SSW Forecast: A chance of rain. Mostly cloudy, with a high near 71. |

