Barometric Pressure in Sammamish, United States

• Forecast Chart
• Hourly Trends

The pressure in Sammamish, Washington, United States is predicted to slowly drop over the next few hours, with an average pressure of

1004.9

today, which is lower than normal.

Weather prediction: Expect more wet and unsettled conditions

The daily total fluctuation in pressure in Sammamish is

2.3

, with a low of

1003.6

and a high of

1005.9

.

Forecast

Sammamish has varying air pressure due to its proximity to Puget Sound and surrounding mountains. Air pressure drops during storms rolling in from the sound. The city's geography creates a rain shadow effect, influencing air pressure and weather. In winter, low pressure brings rain, while high pressure in summer brings clear skies. Sammamish has an oceanic climate with moderate pressure changes throughout the year. Pressure changes are more dramatic near the sound than inland areas. Seasonal changes bring fluctuations: spring has rising pressure, and fall has dropping pressure.