Live · KPHX · reported 23 h 42 min ago
Barometric pressure in Mesa, AZ today
29.95inHg
1014.3 hPa (mb)
- 3-hour change
- −0.06 inHg · −2.0 hPa
- 24-hour range
- 29.90 – 30.02 inHg
- Station (absolute) pressure
- 28.63 inHg
- Barometer dial reads
- Change · near normal
Last 7 days
7-day barometric pressure graph for Mesa
Over the last 7 days, barometric pressure in Mesa ranged from 29.85 inHg (Wednesday) to 30.11 inHg (today). The sharpest fall was 0.14 inHg within six hours, on Tuesday.
| Day · inHg | High | Low | Change |
|---|---|---|---|
| Today | 30.11 | 30.02 | −0.02 |
| Sat, Nov 7 | 30.04 | 29.93 | +0.11 |
| Fri, Nov 6 | 29.99 | 29.90 | −0.02 |
| Thu, Nov 5 | 29.99 | 29.89 | +0.05 |
| Wed, Nov 4 | 29.91 | 29.85 | +0.03 |
| Tue, Nov 3 | 30.09 | 29.89 | −0.18 |
| Mon, Nov 2 | 30.10 | 29.93 | +0.15 |
Altimeter setting from KPHX (METAR), one report per hour. “Change” is the first to the last report of that day; today is so far.
Mesa at a glance
How elevation shapes the reading in Mesa
Mesa is about 1,240 ft (378 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 Phoenix/Sky Harbor Intl (KPHX), 17 km (10 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 Mesa with any other city.
Mesa elevation and what it means · Sea-level vs station pressure
| Elevation | 1,240 ft · 378 m |
|---|---|
| Weather station | Phoenix/Sky Harbor Intl (KPHX) |
| Station elevation | 1,109 ft · 338 m |
| Standard air pressure at this elevation | 28.60 inHg · 969 hPa |
| Air pressure vs sea level | 96% |
| Water boils at | 209.7 °F · 98.7 °C |
| Time zone | America/Phoenix |
Reading the barometer
Is the pressure in Mesa high or low?
Today’s reading is near normal. Weather pressure is quoted at sea level, so the same scale works for Mesa 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 Mesa today?
The live reading at the top of this page is the latest sea-level pressure reported by Phoenix/Sky Harbor Intl (KPHX), 17 km (10 mi) from the city center. It updates about every 10 minutes; the graph shows the last 24 hours.
What is normal barometric pressure in Mesa?
Weather reports for Mesa 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 Mesa read lower than the forecast?
Mesa is close to sea level (about 1,240 ft), so absolute and sea-level pressure differ by only about 1.32 inHg (45 hPa). A larger gap usually means the barometer needs to be calibrated against the reading on this page.
Where can I see a 7-day barometric pressure graph for Mesa?
The graph on this page shows the last 7 days of hourly sea-level pressure from KPHX, with each day's high and low in the table below it. Its sharpest fall usually marks a front or storm passing through.
Is the pressure in Mesa 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.