Barometric Pressure in Portsmouth, United States 
1021.8 hPa
10.9 ℃
46%
0.42 m/s
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The average pressure in Portsmouth, Ohio, United States today is , which is higher than normal. Pressure is trending rising.
Weather prediction: Fairly fine, possible showers early
The daily total fluctuation in pressure in Portsmouth is , with a low of and a high of .
Forecast
Hourly Pressure Trends
Track the barometric pressure in Portsmouth hour by hour across the next 6 hourly 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.