Barometric Pressure in Mercer Island, United States 
1016.1 hPa
11.3 ℃
79%
1.77 m/s
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The average pressure in Mercer Island, Washington, United States today is , which is considered normal. Pressure is trending steady.
Weather prediction: Fairly fine, showers likely
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.