Barometric Pressure in Portland, Oregon, US

The pressure in Portland, United States is predicted to slowly rise over the next few hours, with an average pressure of 1012 hPa today, which is considered normal.

Weather prediction: Expect more fair, dry, cool weather

The daily total fluctuation in pressure in Portland is 4.2 hPa, with a low of 1009.1 hPa and a high of 1013.3 hPa. The daily average here is lower than in most cities around the world.

Forecast

The barometric pressure in Portland, Oregon is generally mild. It averages around 30.15 inches of mercury. This is slightly above the national average.

Portland is situated near the confluence of the Willamette and Columbia rivers. The city is surrounded by mountains to the east and west. The Pacific Ocean lies to the west.

The surrounding mountains and ocean have an impact on the atmospheric pressure. The mountains block some weather patterns from reaching the city. The ocean helps regulate temperature and humidity.

During the winter, a high-pressure system often sits over the Pacific Ocean. This brings dry air from the east, lowering the barometric pressure. In the summer, a low-pressure system develops over the land. This pulls moist air from the ocean, increasing the barometric pressure.

Disclaimer

* The barometric pressure information for Portland, Oregon, United States on this page is for educational purposes only. We are not responsible for its accuracy or reliability. This information is not medical advice. Consult a health professional for medical concerns and do not rely on this site for medical decisions.