Weather in Mercer Island, Washington
Live weather conditions. Source: Open-Meteo
Updated May 24, 2026 · 06:21 PM ET · Refreshes every hour
70°F
Clear sky
Feels like 71°F
48%
Humidity
3 mph
Wind Speed
About Weather in Mercer Island
Mercer Island is located in Washington (coordinates: 47.564004°N, 122.231214°W). Weather data is sourced from Open-Meteo, a free and open meteorological API using data from national weather services including NOAA.
All temperatures are displayed in Fahrenheit. Wind speed is in miles per hour.