Barometric Pressure in Portland, United States 
1013 hPa
15.0 ℃
50%
3.0 m/s
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Forecast
Hourly Pressure Trends
Track the barometric pressure in Portland hour by hour across the next 6 hourly readings.
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.