I-90 weather conditions near Mercer Island, Washington
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Seasoned Weather Conditions
Current Weather Conditions
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7 day weather forecast
Current condition: Overcast 64°F 2025-06-27T17:45:00 
This Afternoon 2025-06-27, Slight Chance Rain. A 20 percent chance of rain. Mostly cloudy, with a high near 66. South southwest wind around 6 mph.
Tonight 2025-06-27, Slight Chance Rain. A slight chance of rain before 8pm, then a slight chance of rain after 10pm. Mostly cloudy, with a low around 58. Light south southwest wind. Chance of precipitation is 20%.
Saturday 2025-06-28, Gradual Clearing. Cloudy through mid morning, then gradual clearing, with a high near 71. Calm wind becoming north northwest around 6 mph in the afternoon.
Saturday Night 2025-06-28, Mostly Clear. Mostly clear, with a low around 55. Northeast wind 3 to 7 mph.
Sunday 2025-06-29, Sunny. Sunny, with a high near 75. Light north northeast wind becoming north 5 to 9 mph in the morning.- Sunday Night 2025-06-29, Mostly Clear. Mostly clear, with a low around 58.
Monday 2025-06-30, Sunny. Sunny, with a high near 80.- Monday Night 2025-06-30, Mostly Clear. Mostly clear, with a low around 60.
- Tuesday 2025-07-01, Sunny. Sunny, with a high near 80.
- Tuesday Night 2025-07-01, Mostly Clear. Mostly clear, with a low around 59.
Wednesday 2025-07-02, Mostly Sunny. Mostly sunny, with a high near 75.
Wednesday Night 2025-07-02, Partly Cloudy. Partly cloudy, with a low around 58.- Thursday 2025-07-03, Mostly Sunny. Mostly sunny, with a high near 74.
- Thursday Night 2025-07-03, Mostly Clear. Mostly clear, with a low around 56.
- Independence Day 2025-07-04, Sunny. Sunny, with a high near 76.