Barometric Pressure in Arnold, United States 
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The pressure in Arnold, Missouri, United States is predicted to quickly drop over the next few hours, with an average pressure of 991.5 hPa today, which is lower than normal.
Weather prediction: Expect gale force weather
The daily total fluctuation in pressure in Arnold is 9.8 hPa, with a low of 985.1 hPa and a high of 994.9 hPa.
Forecast
Hourly Pressure Trends
Track the barometric pressure in Arnold hour by hour and stay informed about how it will change over the next 6 hours.
The weather in Arnold, Missouri, is influenced by changes in air pressure. When air rises, pressure drops, and when air sinks, pressure rises. These changes bring different weather conditions.
Arnold's elevation of 580 feet above sea level and its location near the Mississippi River affect air pressure. The river valley shape and nearby hills also influence pressure changes.
In winter, pressure is usually higher, bringing cold and dry air. In summer, pressure is lower, bringing hot and humid air. In spring and fall, pressure changes bring mild and unstable weather.
Arnold has a humid continental climate, which means it experiences large pressure fluctuations between seasons. This leads to varying weather conditions and a noticeable change in air pressure throughout the year.