Weather in Mercer Island, United States 🇺🇸
As of now, Mercer Island is 15°C and overcast, feeling like 12°C. Relative humidity is 75%, with winds around 14 km/h, and the UV index is 0 (low). In the days ahead, expect temperatures in Mercer Island from about 7°C to 16°C.
Hourly Forecast for Mercer Island
14-Day Forecast for Mercer Island
Overcast
Sunny
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Sunny
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Light drizzle
Light drizzle
Patchy rain nearby
Patchy rain nearby
Patchy rain nearby
Overcast
Additional Forecasts for Mercer Island
Air Quality
Historical Weather
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Best Time to Be Outside in Mercer Island Today
The most comfortable window in Mercer Island today looks like 16:00 to 19:00, when it is around 14°C. It should stay dry through that window. The next likely rain is around 04:00.
Frequently Asked Questions about Weather in Mercer Island
What is the temperature in Mercer Island right now?
The current temperature in Mercer Island is 15°C (58°F), overcast (feels like 12°C).
What's the weather like in Mercer Island right now?
Current weather in Mercer Island: Overcast, humidity 75%, wind 14 km/h S.
What is today's forecast for Mercer Island?
Today in Mercer Island: high 15°C, low 10°C, overcast. Chance of rain: 61%.
What is the 7-day weather forecast for Mercer Island?
Daily highs and lows for Mercer Island:
- 2026-10-17: 15°C / 10°C
- 2026-10-18: 16°C / 7°C
- 2026-10-19: 15°C / 8°C
- 2026-10-20: 15°C / 7°C
- 2026-10-21: 18°C / 7°C
- 2026-10-22: 15°C / 8°C
- 2026-10-23: 12°C / 7°C
Is it going to rain in Mercer Island today?
There is a 61% chance of rain in Mercer Island today. Total expected precipitation: 1.61 mm.
What is the wind speed in Mercer Island right now?
Wind in Mercer Island is currently 14 km/h (9 mph) from the S.
What is the UV index in Mercer Island right now?
The UV index in Mercer Island is currently 0 (low). Sun protection is recommended when the index is 3 or higher.
