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Barometric Pressure in Napa, California, US


0000 hPa
00.00 inHg


00.0 ℃
0.00 ℉


00.0 m/s
00.0 mph


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The pressure in Napa, United States United States is predicted to slowly drop over the next few hours, with an average pressure of 1015.1 hPa today, which is considered normal.


Weather prediction: Expect more wet and unsettled conditions

The daily total fluctuation in pressure in Napa is 5.2 hPa, with a low of 1012.1 hPa and a high of 1017.3 hPa. The daily average here is higher than in most cities around the world.



The barometric pressure in Napa, California is relatively consistent throughout the year. The average pressure is around 30.06 inches of mercury. It rarely falls below 29.80 inches or rises above 30.30 inches.

Barometric pressure

Napa is situated in a valley surrounded by mountains to the west and east. The coastal mountain range is about 30 miles west of Napa. The Sierra Nevada mountain range is about 100 miles east of Napa.

The surrounding mountains affect the atmospheric pressure in Napa. They block or redirect wind patterns and air masses. This results in a more stable atmosphere and consistent pressure.

The valley shape also contributes to the stable pressure. It allows for gentle air flow and prevents drastic changes in air pressure. Additionally, the valley acts as a trap for cold air, which helps regulate temperature and pressure.


* The barometric pressure information for Napa, California, United States on this page is for educational purposes only. We are not responsible for its accuracy or reliability. This information is not medical advice. Consult a health professional for medical concerns and do not rely on this site for medical decisions.