Barometric Pressure in Washington, United States 
0000 hPa
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The pressure in Washington, Washington, D.C., United States is predicted to slowly drop over the next few hours, with an average pressure of 1020.7 hPa today, which is considered normal.
Weather prediction: Expect more wet and unsettled conditions
The daily total fluctuation in pressure in Washington is 4.4 hPa, with a low of 1018 hPa and a high of 1022.4 hPa.
Forecast
Hourly Pressure Trends
Track the barometric pressure in Washington hour by hour and stay informed about how it will change over the next 6 hours.
Washington, D.C.'s weather is affected by its location near the Atlantic Ocean and the Appalachian Mountains. These bodies of water and land create weather patterns that impact air pressure.
The city's coastal location means it gets hit with oceanic air masses, which bring high air pressure and fair weather. When these air masses meet the Appalachian Mountains, they force air to rise, creating low air pressure and rain.
In the summer, high air pressure dominates, bringing hot and humid weather. In the winter, low air pressure is common, resulting in cold and snowy conditions.
Washington, D.C. has a humid subtropical climate, characterized by hot summers and mild winters. This climate type means the city experiences significant pressure changes between seasons, leading to varying weather patterns.