7-Day Forecast Summary
7-Day Detailed Weather Forecast for Mercer Island
Tonight |
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Temperature: 54°F Wind Speed: 5 mph Wind Direction: SSE Forecast: Mostly cloudy, with a low around 54. South southeast wind around 5 mph. |
Wednesday |
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Temperature: 66°F Wind Speed: 1 to 5 mph Wind Direction: S Forecast: A slight chance of rain before 8am. Partly sunny, with a high near 66. South wind 1 to 5 mph. Chance of precipitation is 20%. |
Wednesday Night |
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Temperature: 50°F Wind Speed: 3 mph Wind Direction: NNE Forecast: Partly cloudy, with a low around 50. North northeast wind around 3 mph. |
Thursday |
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Temperature: 72°F Wind Speed: 3 mph Wind Direction: NNE Forecast: Mostly sunny, with a high near 72. North northeast wind around 3 mph. |
Thursday Night |
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Temperature: 53°F Wind Speed: 3 mph Wind Direction: ENE Forecast: Mostly clear, with a low around 53. East northeast wind around 3 mph. |
Friday |
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Temperature: 75°F Wind Speed: 3 mph Wind Direction: SSE Forecast: Mostly sunny, with a high near 75. |
Friday Night |
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Temperature: 56°F Wind Speed: 2 to 12 mph Wind Direction: S Forecast: A chance of rain after 11pm. Mostly cloudy, with a low around 56. |
Saturday |
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Temperature: 62°F Wind Speed: 3 to 12 mph Wind Direction: SSW Forecast: A chance of rain before 5pm. Mostly cloudy, with a high near 62. |
Saturday Night |
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Temperature: 45°F Wind Speed: 3 mph Wind Direction: ENE Forecast: Mostly cloudy, with a low around 45. |
Sunday |
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Temperature: 60°F Wind Speed: 2 mph Wind Direction: S Forecast: A slight chance of rain after 5pm. Partly sunny, with a high near 60. |
Sunday Night |
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Temperature: 50°F Wind Speed: 2 to 6 mph Wind Direction: S Forecast: Rain likely. Mostly cloudy, with a low around 50. |
Monday |
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Temperature: 57°F Wind Speed: 6 mph Wind Direction: S Forecast: Rain likely. Mostly cloudy, with a high near 57. |
Monday Night |
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Temperature: 47°F Wind Speed: 5 mph Wind Direction: SSE Forecast: A chance of rain. Mostly cloudy, with a low around 47. |
Tuesday |
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Temperature: 57°F Wind Speed: 3 mph Wind Direction: SW Forecast: A slight chance of rain before 5pm. Partly sunny, with a high near 57. |

