Barometric Pressure in Fairfax, United States 
1032.5 hPa
15.3 ℃
44%
2.38 m/s
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The average pressure in Fairfax, Virginia, United States today is , which is higher than normal. Pressure is trending steady.
Weather prediction: Showery early, improving
Rapid Pressure Changes
Rapid pressure changes detected in Fairfax, often a sign of approaching weather shifts. See the forecast chart or get pressure alerts.
- Rapid Rise : ()
The daily total fluctuation in pressure in Fairfax is , with a low of and a high of .
Forecast
Hourly Pressure Trends
Track the barometric pressure in Fairfax hour by hour across the next 6 hourly readings.
Fairfax's weather pattern moves from high to low pressure and back to high again, causing changes in the air pressure.
The area's 300-foot elevation and mix of hills and valleys affect atmospheric pressure, making it change often. The nearby Blue Ridge Mountains also influence pressure patterns.
In winter, pressure is usually high, bringing cold air. In summer, pressure is lower, making it hot and humid. Spring and autumn have moderate pressure, with mild weather.
Fairfax has a humid subtropical climate, with noticeable changes in barometric pressure throughout the year, which affects the weather and how people feel.