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 43°F 2025-11-19T07:15:00 Today 2025-11-19, Patchy Fog then Mostly Sunny. Patchy fog before 11am. Otherwise, mostly sunny, with a high near 53. Light and variable wind.
Tonight 2025-11-19, Mostly Cloudy then Chance Rain. A 50 percent chance of rain after 1am. Mostly cloudy, with a low around 45. Southeast wind around 6 mph.
Thursday 2025-11-20, Chance Rain then Slight Chance Rain. A 50 percent chance of rain, mainly before 10am. Partly sunny, with a high near 54. South southwest wind around 5 mph.
Thursday Night 2025-11-20, Chance Rain and Patchy Fog. A 30 percent chance of rain. Patchy fog between 9pm and 10pm. Otherwise, mostly cloudy, with a low around 44. South southeast wind 3 to 5 mph.
Friday 2025-11-21, Chance Rain. A 40 percent chance of rain. Mostly cloudy, with a high near 54. South wind around 6 mph.
Friday Night 2025-11-21, Rain Likely. Rain likely, mainly after 10pm. Mostly cloudy, with a low around 50. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday 2025-11-22, Rain Likely. Rain likely. Cloudy, with a high near 56. Chance of precipitation is 70%.
Saturday Night 2025-11-22, Rain Likely. Rain likely. Mostly cloudy, with a low around 49.
Sunday 2025-11-23, Rain Likely. Rain likely. Cloudy, with a high near 54.- Sunday Night 2025-11-23, Rain Likely. Rain likely. Mostly cloudy, with a low around 45.
- Monday 2025-11-24, Rain Likely. Rain likely. Mostly cloudy, with a high near 51.
- Monday Night 2025-11-24, Chance Rain and Patchy Fog. A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 38.
- Tuesday 2025-11-25, Chance Rain and Patchy Fog. A chance of rain. Patchy fog. Otherwise, mostly sunny, with a high near 48.