Barometric Pressure in Norristown, United States 
0000 hPa
00.0 ℃
00.0%
00.0 m/s
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The pressure in Norristown, Pennsylvania, United States is predicted steady over the next 24 hours, with an average pressure of today, which is considered normal.
Weather prediction: Fairly fine, showers likely
Rapid Pressure Changes
Rapid pressure changes detected in Norristown - often a sign of approaching weather shifts. Get accurate local time and alerts on our iOS app.
- Rapid Fall - ()
- Rapid Rise - ()
- Rapid Rise - ()
- Rapid Rise - ()
The daily total fluctuation in pressure in Norristown is , with a low of and a high of .
Forecast
Hourly Pressure Trends
Track the barometric pressure in Norristown hour by hour and stay informed about how it will change over the next 6 hours.
Norristown has changing air pressure due to its location near mountains and valleys. Weather patterns like high and low-pressure systems move in, affecting air pressure.
The nearby Schuylkill River and mountains impact air pressure. Cold air sinks into valleys, making pressure higher, while warm air rises, making pressure lower.
In winter, high pressure brings cold air, while in summer, low pressure brings warm air. Spring and fall have changing pressure, with sometimes warm and sometimes cold air.
Norristown has a humid subtropical climate. This means it has hot summers with low pressure and cold winters with high pressure.