Barometric Pressure in Portland, United States 
0000 hPa
00.0 ℃
00.0 m/s
00.0%
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The pressure in Portland, Tennessee, United States is predicted to drop over the next few hours, with an average pressure of today, which is lower than normal.
Weather prediction: Expect wet, unsettled weather and a strong breeze
The daily total fluctuation in pressure in Portland is , with a low of and a high of .
Forecast
Hourly Pressure Trends
Track the barometric pressure in Portland hour by hour and stay informed about how it will change over the next 6 hours.
Portland, Tennessee has varying air pressure due to changing weather patterns. High pressure brings clear skies, while low pressure brings rain and storms.
The city's geography, near the Cumberland River and surrounded by hills, affects air pressure. Moist air from the river rises, cools, and condenses, forming clouds and precipitation.
In spring and summer, low air pressure dominates, bringing thunderstorms. In fall and winter, high pressure returns, bringing clearer skies.
Portland has a humid subtropical climate. This means hot summers have low air pressure, leading to thunderstorms, while mild winters have higher air pressure.