United States
Barometric Pressure in San Jose, CA
San Jose is in California, United States. These forecasts use the saved city coordinates; nearby weather model grid points and their elevations may differ.
- Coordinates: 37.3394, -121.8950
- Timezone: America/Los_Angeles
- Approximate terrain elevation: 26 m
Current pressure
—hPa
- Surface pressure
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- Change over three hours
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Pressure trend and forecast
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Yesterday through the seven-day forecast. Drag across the chart to explore hourly pressure; release to return to now.
Predicted Rapid Changes
Daily Forecast
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Normal barometric pressure in San Jose
San Jose is close to sea level (about 26 m), so a barometer or phone sensor there typically reads around 1,010 hPa (29.83 inHg), only about 3 hPa below the sea-level figures in weather reports.
| Reference | hPa | inHg | mmHg |
|---|---|---|---|
| Standard sea-level pressure (used in weather reports) | 1,013.25 | 29.92 | 760 |
| Typical surface pressure at about 26 m (standard-atmosphere estimate) | 1,010 | 29.83 | 758 |
Because the two values are close, local readings and weather reports in San Jose are easy to compare directly.
Average barometric pressure in San Jose (2021–2025)
From 2021 to 2025, sea-level pressure in San Jose averaged 1,016.6 hPa (30.02 inHg). On 9 days out of 10, the daily average stayed between 1,010 and 1,024 hPa (29.82–30.25 inHg).
Pressure averaged highest in January (1,020.1 hPa) and lowest in September (1,013.4 hPa), a seasonal swing of about 7 hPa. From one day to the next, the daily average typically changed by about 2 hPa, and by 5 hPa or more on about 1 day in 10.
The lowest hourly value in the period was 990.7 hPa on March 21, 2023; the highest was 1,033.7 hPa on January 21, 2025.
| Month | Avg hPa | Avg inHg | Usual range |
|---|---|---|---|
| January | 1,020.1 | 30.12 | 1,012–1,026 |
| February | 1,019.1 | 30.09 | 1,012–1,025 |
| March | 1,017.9 | 30.06 | 1,012–1,024 |
| April | 1,017.6 | 30.05 | 1,014–1,022 |
| May | 1,015.4 | 29.99 | 1,012–1,019 |
| June | 1,013.7 | 29.93 | 1,011–1,017 |
| July | 1,014.3 | 29.95 | 1,011–1,017 |
| August | 1,014.1 | 29.95 | 1,010–1,017 |
| September | 1,013.4 | 29.93 | 1,010–1,017 |
| October | 1,015.8 | 30.00 | 1,011–1,020 |
| November | 1,018.8 | 30.09 | 1,014–1,023 |
| December | 1,018.9 | 30.09 | 1,012–1,024 |
Reading the pressure
Sea-level pressure allows comparison between places at different elevations. Surface pressure represents pressure at the modelled ground elevation. A rising or falling value describes a trend; it is not a complete weather forecast.
Barometric pressure in San Jose: common questions
What is normal barometric pressure in San Jose?
For weather comparisons, normal sea-level pressure is 1,013.25 hPa (29.92 inHg, 760 mmHg). Readings above it are higher than standard and readings below it are lower. From 2021 to 2025, sea-level pressure in San Jose averaged 1,016.6 hPa (30.02 inHg), and on 9 days out of 10 the daily average was between 1,010 and 1,024 hPa. A barometer measuring local pressure at about 26 m in San Jose typically reads around 1,010 hPa (29.83 inHg).
Why does my phone show a different pressure in San Jose than the weather report?
Phone sensors and household barometers measure pressure where you are, while weather reports adjust readings to sea level so places can be compared. In San Jose, that adjustment is about 3 hPa (0.09 inHg) under standard conditions, and it grows if you are on a higher floor or hill.
Is the barometric pressure in San Jose high or low today?
When live data loads, compare the current sea-level reading above with 1,013 hPa (29.92 inHg). The three-hour change and the seven-day trend usually say more about changing weather than a single value. Normal, high, and low pressure explained.