Barometric Pressure
Barometric Pressure in Mercer Island, United States 
1021.4 hPa
12.5 ℃
50%
1.53 m/s
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The average pressure in Mercer Island, Washington, United States today is , which is considered normal. Pressure is trending falling.
Weather prediction: Rain at times, very unsettled
Rapid Pressure Changes
Rapid pressure changes detected in Mercer Island, often a sign of approaching weather shifts. See the forecast chart or get pressure alerts.
- Rapid Fall : ()
The daily total fluctuation in pressure in Mercer Island is , with a low of and a high of .
Forecast
Hourly Pressure Trends
Track the barometric pressure in Mercer Island hour by hour across the next 6 hourly readings.
Mercer Island has mild winters and cool summers. Its location near Lake Washington and Puget Sound affects air pressure, making it more stable. The island's hilly geography blocks winds, reducing pressure changes. In winter, low pressure brings rain, while high pressure in summer brings sunshine. Mercer Island has a mild oceanic climate, meaning pressure changes are small, leading to gentle weather.