Barometric Pressure in Arnold, United States 
1018.8 hPa
16.6 ℃
92%
2.15 m/s
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The average pressure in Arnold, Maryland, United States today is , which is considered normal. Pressure is trending steady.
Weather prediction: Changeable, mending
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.