Barometric Pressure in Washington D.C., United States 
1009 hPa
15.2 ℃
71%
3.61 m/s
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The average pressure in Washington D.C., District of Columbia, United States today is , which is lower than normal. Pressure is trending falling.
Weather prediction: Rain at times, very unsettled
Rapid Pressure Changes
Rapid pressure changes detected in Washington D.C., often a sign of approaching weather shifts. See the forecast chart or get pressure alerts.
- Rapid Rise : ()
- Rapid Rise : ()
The daily total fluctuation in pressure in Washington D.C. is , with a low of and a high of .
Forecast
Hourly Pressure Trends
Track the barometric pressure in Washington D.C. hour by hour across the next 6 hourly readings.
Washington, D.C. has four changing seasons. Summers are hot and humid, with frequent thunderstorms. Winters are cool, and snowfall varies from year to year. Spring and fall often bring mild temperatures, but weather can change quickly. Rain falls throughout the year.
Air pressure systems help control these changes. Low pressure often brings clouds, rain, strong winds, or snow. High pressure usually brings calmer and drier weather. Cold air can move down from Canada, while warm, moist air can move north from the Gulf of Mexico and Atlantic Ocean. These air masses often meet near the region, creating changing weather and storms.
The Potomac and Anacostia rivers, along with the nearby Chesapeake Bay, add moisture to the air and slightly soften winter temperatures. The city’s inland location still allows cold air to arrive easily. Buildings and paved streets can make the city warmer than nearby rural areas, especially at night.
The local climate is humid and has warm summers and cool winters. Summer heat can feel stronger because of high humidity. Winter storms may bring rain, snow, or ice, depending on the temperature. Large storms called nor’easters can sometimes bring heavy snow, strong winds, and coastal flooding.