Barometric Pressure in Arnold, United States 
1021.9 hPa
21.6 ℃
48%
3.55 m/s
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The average pressure in Arnold, Missouri, United States today is , which is considered normal. Pressure is trending falling.
Weather prediction: Rain at times, very unsettled
Rapid Pressure Changes
Rapid pressure changes detected in Arnold, often a sign of approaching weather shifts. See the forecast chart or get pressure alerts.
- Rapid Fall : ()
The daily total fluctuation in pressure in Arnold is , with a low of and a high of .
Forecast
Hourly Pressure Trends
Track the barometric pressure in Arnold hour by hour across the next 6 hourly readings.
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.