Barometric Pressure in Sammamish, United States 
1020.4 hPa
5.1 ℃
75%
0.82 m/s
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The average pressure in Sammamish, Washington, United States today is , which is higher than normal. Pressure is trending rising.
Weather prediction: Fairly fine, possible showers early
Rapid Pressure Changes
Rapid pressure changes detected in Sammamish, often a sign of approaching weather shifts. See the forecast chart or get pressure alerts.
- Rapid Fall : ()
The daily total fluctuation in pressure in Sammamish is , with a low of and a high of .
Forecast
Hourly Pressure Trends
Track the barometric pressure in Sammamish hour by hour across the next 6 hourly readings.
Sammamish has varying air pressure due to its location near Puget Sound and surrounding mountains. Air pressure drops during storms coming from the Pacific Ocean. The city's proximity to water keeps air pressure relatively stable.
Sammamish is situated in a valley, which can trap cold air and make pressure lower in winter. Mountains around the city block or redirect winds, changing air pressure.
In winter, high pressure builds over land, bringing cold and clear weather. Low pressure dominates in spring and fall, leading to rain.
Sammamish has an oceanic climate with mild temperatures and significant rainfall. This climate type results in generally lower air pressure throughout the year. Rainfall and mild temperatures mean stable, but varying air pressure.