Barometric Pressure in Norristown, United States 
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The pressure in Norristown, Pennsylvania, United States is predicted to drop over the next few hours, with an average pressure of 1016.8 hPa today, which is considered normal.
Weather prediction: Expect wet, unsettled weather and a strong breeze
The daily total fluctuation in pressure in Norristown is 5.8 hPa, with a low of 1013.5 hPa and a high of 1019.3 hPa.
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.
The weather in Norristown often brings changes in barometric pressure, which is the weight of the air pressing down on the Earth. This pressure can rise or fall quickly, causing changes in the weather.
The town's elevation, about 90 feet above sea level, and its location in a valley affect the air pressure. The surrounding hills and mountains also influence the pressure, making it vary from day to day.
In the winter, the pressure is usually lower, bringing cold air and possible snow. In the summer, the pressure is higher, making the air hotter and more humid. In spring and fall, the pressure is in between, bringing mild temperatures.
Norristown has a humid subtropical climate, which means it has hot summers and cold winters. This climate type causes big swings in barometric pressure, making the weather change often and sometimes suddenly.