Barometric Pressure in Arnold, United States 
1012.1 hPa
21.6 ℃
77%
1.8 m/s
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The average pressure in Arnold, Maryland, United States today is , which is considered normal. Pressure is trending rising.
Weather prediction: Fine, possible showers
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 : ()
- Rapid Rise : ()
- 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.
Arnold has varying air pressure due to changing weather. High pressure brings clear skies, while low pressure brings rain or snow.
The town's location near Chesapeake Bay and surrounding hills affects air pressure. Moist air from the bay cools and rises, creating areas of low pressure.
In spring, air pressure increases as high-pressure systems dominate. Summer brings low pressure with thunderstorms. Autumn sees rising pressure with clear skies. Winter brings low pressure with snow.
Arnold has a humid subtropical climate. This means air pressure changes are moderate, with warm summers and cold winters affecting pressure.