Barometric Pressure in Philadelphia, United States 
0000 hPa
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The pressure in Philadelphia, New York, United States is predicted to slowly drop over the next few hours, with an average pressure of 988 hPa today, which is lower than normal.
Weather prediction: Expect more wet and unsettled conditions
The daily total fluctuation in pressure in Philadelphia is 10.7 hPa, with a low of 982.5 hPa and a high of 993.2 hPa.
Forecast
Hourly Pressure Trends
Track the barometric pressure in Philadelphia hour by hour and stay informed about how it will change over the next 6 hours.
Weather in Philadelphia changes often because of its location near the Atlantic Ocean and Gulf of Mexico. This causes barometric pressure to rise and fall frequently.
Philadelphia's elevation near sea level and varied landscape of hills and rivers affect atmospheric pressure. Mountains to the west block some air masses, while the Atlantic Ocean brings in others.
In winter, pressure is usually low, bringing cold air and snow. In summer, high pressure dominates, leading to warm and humid weather. Spring and fall have more variable pressure.
Philadelphia has a humid subtropical climate, with hot summers and cold winters. This leads to large fluctuations in barometric pressure, making the weather feel unpredictable and changing often.