Live · KSJC · reported 16 min ago
Barometric pressure in San Jose, CA today
30.06inHg
1018.0 hPa (mb)
- 3-hour change
- −0.01 inHg · −0.4 hPa
- 24-hour range
- 30.05 – 30.10 inHg
- Station (absolute) pressure
- 29.97 inHg
- Barometer dial reads
- Change · slightly high
San Jose at a glance
How elevation shapes the reading in San Jose
San Jose is about 85 ft (26 m) above sea level. That is close to sea level, so the pressure you stand in and the sea-level figure in the forecast are nearly the same.
The reading above is the altimeter setting from San Jose Intl Arpt (KSJC), 3 km (2 mi) from the city center. It is the station’s measured pressure corrected to sea level, which is the number weather reports, apps and TV forecasts use, so you can compare San Jose with any other city.
San Jose elevation and what it means · Sea-level vs station pressure
| Elevation | 85 ft · 26 m |
|---|---|
| Weather station | San Jose Intl Arpt (KSJC) |
| Station elevation | 43 ft · 13 m |
| Standard air pressure at this elevation | 29.83 inHg · 1010 hPa |
| Air pressure vs sea level | 100% |
| Water boils at | 211.8 °F · 99.9 °C |
| Time zone | America/Los Angeles |
Reading the barometer
Is the pressure in San Jose high or low?
Today’s reading is slightly high. Weather pressure is quoted at sea level, so the same scale works for San Jose and everywhere else.
- Very low Stormy < 29.50
- Low Clouds, rain 29.50–29.80
- Normal Changeable 29.80–30.20
- High Fair 30.20–30.50
- Very high Dry, clear > 30.50
Frequently asked questions
What is the barometric pressure in San Jose today?
The live reading at the top of this page is the latest sea-level pressure reported by San Jose Intl Arpt (KSJC), 3 km (2 mi) from the city center. It updates about every 10 minutes; the graph shows the last 24 hours.
What is normal barometric pressure in San Jose?
Weather reports for San Jose use sea-level pressure, so “normal” is the same as anywhere: about 29.92 inHg (1013 hPa), with most days between 29.60 and 30.30 inHg (1002–1026 hPa). Readings above 30.20 inHg are high pressure; below 29.80 inHg is low pressure.
Why does a barometer in San Jose read lower than the forecast?
San Jose is close to sea level (about 85 ft), so absolute and sea-level pressure differ by only about 0.09 inHg (3 hPa). A larger gap usually means the barometer needs to be calibrated against the reading on this page.
Is the pressure in San Jose rising or falling?
See the trend badge under the reading: it compares the latest report with the one three hours earlier. Falling pressure usually means clouds, wind or rain on the way; rising pressure means clearing and more settled weather.