Barometric Pressure in Annandale, United States 
1027.4 hPa
12.3 ℃
57%
1.91 m/s
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The average pressure in Annandale, Virginia, United States today is , which is higher than normal. Pressure is trending rising.
Weather prediction: Fairly fine, showery later
Rapid Pressure Changes
Rapid pressure changes detected in Annandale, often a sign of approaching weather shifts. See the forecast chart or get pressure alerts.
- Rapid Fall : ()
The daily total fluctuation in pressure in Annandale is , with a low of and a high of .
Forecast
Hourly Pressure Trends
Track the barometric pressure in Annandale hour by hour across the next 6 hourly readings.
The barometric pressure in Annandale, Virginia varies throughout the day. It changes depending on the movement of high and low-pressure systems. These systems bring different types of weather to the area.
Annandale is located near the Piedmont region. This region is a gentler slope between the Appalachian Mountains and the Atlantic Coastal Plain. The surrounding landscape affects the atmospheric pressure.
The mountains to the west influence the pressure. They block or redirect air masses moving from the west. This can lead to changes in the pressure. The coastal plain to the east has a different effect. It allows air from the ocean to move freely into the area.