Barometric Pressure in Napa, United States 
1013 hPa
15.0 ℃
50%
3.0 m/s
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Forecast
Hourly Pressure Trends
Track the barometric pressure in Napa hour by hour across the next 6 hourly readings.
The barometric pressure in Napa, California varies throughout the year. It changes depending on the weather systems that move into the region. High-pressure systems bring fair weather. Low-pressure systems bring rain and storms.
Napa is surrounded by hills and mountains to the east and west. The Pacific Ocean lies to the west. The combination of land and sea influences the atmosphere. The hills and mountains block or redirect air masses. The Pacific Ocean moderates temperatures. The unique landscape around Napa contributes to the fluctuating barometric pressure.