Barometric Pressure in Portsmouth, United States 
0000 hPa
00.0 ℃
00.0%
00.0 m/s
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Forecast
Hourly Pressure Trends
Track the barometric pressure in Portsmouth hour by hour and stay informed about how it will change over the next 6 hours.
Upcoming Days
Stay informed about the barometric pressure trends in Portsmouth for the upcoming days, including daily minimum and maximum readings.
Weather patterns in Portsmouth bring changes in barometric pressure, which can rise or fall when high or low-pressure systems move in. Pressure changes can be sudden or gradual.
Portsmouth's elevation, 547 feet above sea level, and surrounding hills affect atmospheric pressure, making it more variable than in coastal areas. The landscape can funnel winds, adding to pressure fluctuations.
In summer, pressure is usually lower, leading to hot and humid weather, while in winter, higher pressure brings colder air. Spring and fall bring more pressure changes, leading to mixed weather.
Portsmouth has a humid continental climate, with large pressure fluctuations throughout the year, making the weather unpredictable and changing quickly.