Barometric Pressure in Philadelphia, United States 
1023.6 hPa
9.4 ℃
77%
2.3 m/s
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The average pressure in Philadelphia, New York, United States today is , which is higher than normal. Pressure is trending rising.
Weather prediction: Fairly fine, possible showers early
Rapid Pressure Changes
Rapid pressure changes detected in Philadelphia, often a sign of approaching weather shifts. See the forecast chart or get pressure alerts.
- Rapid Rise : ()
The daily total fluctuation in pressure in Philadelphia is , with a low of and a high of .
Forecast
Hourly Pressure Trends
Track the barometric pressure in Philadelphia hour by hour across the next 6 hourly readings.
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.
(41 km)