Barometric Pressure in Napa, United States 
1006.2 hPa
14.6 ℃
76%
1.12 m/s
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The average pressure in Napa, California, United States today is , which is lower than normal. Pressure is trending rising.
Weather prediction: Fairly fine, improving
The daily total fluctuation in pressure in Napa is , with a low of and a high of .
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.