Weather in Mercer Island, Washington as of 29 June, 2025. Temperature, rain and forecast for this week.

The following widget shows the weather in Mercer Island, Washington as of 29 June, 2025. Click on the widget to open the weather forecast for Mercer Island. Please note: the weather in Mercer Island may change in any second, so make your decisions wisely and follow the news.

MERCER ISLAND WEATHER

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Good weather and PEACE to everyone!

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