Barometric pressure in Boston, MA today
29.68 inHg
1005.2 hPa (mb)
- 3-hour change
- +0.4 hPa (+0.01 inHg)
- 24-hour range
- 29.67 inHg / 1004.8 hPa to 29.83 inHg / 1010.2 hPa
- Station (absolute) pressure
- 29.63 inHg / 1003.5 hPa
- Observed
- 3:54 PM EST · Boston/Logan Intl, MA, US (KBOS)
Boston at a glance
How elevation shapes the reading in Boston
Boston is about 46 ft (14 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 Boston/Logan Intl (KBOS), 4 km (3 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 Boston with any other city.
Boston elevation and what it means · Sea-level vs station pressure
| Elevation | 46 ft · 14 m |
|---|---|
| Weather station | Boston/Logan Intl (KBOS) |
| Station elevation | 13 ft · 4 m |
| Standard air pressure at this elevation | 29.87 inHg · 1012 hPa |
| Air pressure vs sea level | 100% |
| Water boils at | 211.9 °F · 100.0 °C |
| Time zone | America/New York |
Reading the barometer
What today’s pressure means for Boston
High: above 30.20 inHg
Above about 1023 hPa. Sinking air under high pressure usually brings clear skies, light winds and, in winter, colder nights.
Normal: 29.80 – 30.20 inHg
About 1009–1023 hPa. Weather can go either way, so the 3-hour trend is the better guide.
Low: below 29.80 inHg
Below about 1009 hPa. Rising air under low pressure builds clouds; expect wind and rain, especially if the pressure keeps falling.
Frequently asked questions
What is the barometric pressure in Boston today?
The live reading at the top of this page is the latest sea-level pressure reported by Boston/Logan Intl (KBOS), 4 km (3 mi) from the city center. It updates about every 10 minutes; the graph shows the last 24 hours.
What is normal barometric pressure in Boston?
Weather reports for Boston 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 Boston read lower than the forecast?
Boston is close to sea level (about 46 ft), so absolute and sea-level pressure differ by only about 0.05 inHg (2 hPa). A larger gap usually means the barometer needs to be calibrated against the reading on this page.
Is the pressure in Boston 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.