Current Conditions

Mercer Island, Washington

67°F19°C
Drizzle

Wind

SSW 7 mph12 km/h

Humidity

74%

Cloud Cover

82%

As of Thursday, July 23, 2026 at 10:56 AM PDT

Today's Outlook

Day

Mostly cloudy and warm, with a high of 73°F23°C and morning low of 65°F18°C. Breezy from the SSW at 7 to 8 mph11 to 13 km/h. 16% chance of drizzle in the afternoon.

Night

Mostly cloudy, with a low around 65°F18°C. Breezy from the SSW at 5 to 8 mph9 to 13 km/h.

7-Day Forecast

DayConditionHigh (°F)Low (°F)Precip (mm)Cloud Cover (%)Wind (mph)
ThursdayJul 23DrizzleHigh 73°F23°CLow 65°F18°CPrecip 0.02 in0.4 mm16%Cloud 68%Wind SSW 6 mph10 km/hThursday: Mostly cloudy and warm, with a high of 73°F23°C and morning low of 65°F18°C. Breezy from the SSW at 7 to 8 mph11 to 13 km/h. 16% chance of drizzle in the afternoon. Thursday Night: Mostly cloudy, with a low around 65°F18°C. Breezy from the SSW at 5 to 8 mph9 to 13 km/h.
FridayJul 24Partly CloudyHigh 78°F26°CLow 64°F18°CPrecip 0 in0.1 mm1%Cloud 52%Wind WSW 3 mph5 km/hFriday: Mostly cloudy and warm, with a high of 78°F26°C and morning low of 66°F19°C. Light wind from the W around 3 mph5 km/h. Friday Night: Partly cloudy, with a low around 64°F18°C. Light wind from the SW around 4 mph6 km/h.
SaturdayJul 25DrizzleHigh 71°F22°CLow 62°F17°CPrecip 0.02 in0.4 mm18%Cloud 67%Wind SSW 8 mph13 km/hSaturday: Mostly cloudy and warm, with a high of 71°F22°C and morning low of 63°F17°C. Breezy from the SW at 9 to 11 mph15 to 17 km/h. 18% chance of drizzle around midday. Saturday Night: Mostly cloudy, with a low around 62°F17°C. Breezy from the SSW at 7 mph11 km/h.
SundayJul 26DrizzleHigh 72°F22°CLow 62°F17°CPrecip 0.04 in1.1 mm48%Cloud 74%Wind SSW 6 mph10 km/hSunday: Overcast and warm, with a high of 72°F22°C and morning low of 65°F18°C. Breezy from the SW at 8 mph12 km/h. 48% chance of drizzle throughout the day. Sunday Night: Mostly cloudy, with a low around 62°F17°C. Light wind from the SSW around 5 mph9 km/h. 15% chance of drizzle in the evening.
MondayJul 27DrizzleHigh 76°F25°CLow 60°F16°CPrecip 0.02 in0.6 mm16%Cloud 46%Wind SSW 5 mph7 km/hMonday: Mostly cloudy and warm, with a high of 76°F25°C and morning low of 63°F17°C. Light wind from the SW around 5 mph9 km/h. 16% chance of drizzle around midday. Monday Night: Partly cloudy, with a low around 60°F16°C. Light wind from the SSW around 4 mph6 km/h.
TuesdayJul 28Partly CloudyHigh 75°F24°CLow 60°F16°CPrecip 0.01 in0.3 mm6%Cloud 41%Wind SSW 6 mph10 km/hTuesday: Mostly cloudy and warm, with a high of 75°F24°C and morning low of 64°F18°C. Breezy from the SW at 8 to 9 mph13 to 14 km/h. Tuesday Night: Partly cloudy, with a low around 60°F16°C. Light wind from the SSW around 5 mph8 km/h.
WednesdayJul 29DrizzleHigh 75°F24°CLow 60°F16°CPrecip 0.02 in0.5 mm10%Cloud 41%Wind WSW 4 mph7 km/hWednesday: Mostly cloudy and warm, with a high of 75°F24°C and morning low of 63°F17°C. Light wind from the WSW around 5 mph7 km/h. 10% chance of drizzle around midday. Wednesday Night: Partly cloudy, with a low around 60°F16°C. Light wind from the W around 4 mph7 km/h.

15-Day Forecast

Day High (°F) Low (°F) Precip (mm) Cloud Cover (%) Condition Wind (mph)

Nearby Cities

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

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Coordinates: 47.5707°N, 122.2221°W·Elevation: 102m·Timezone: America/Los_Angeles·Population: 25,042