Barometric Pressure in Portsmouth, United States 
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The pressure in Portsmouth, Ohio, United States is predicted to slowly drop over the next few hours, with an average pressure of 994.5 hPa today, which is lower than normal.
Weather prediction: Expect more wet and unsettled conditions
The daily total fluctuation in pressure in Portsmouth is 4.9 hPa, with a low of 991.8 hPa and a high of 996.7 hPa.
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.
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.