KIAH pressure (QNH) trend
George Bush Intercontinental Airport
The altimeter setting over time. Sharp falls mark approaching systems; the range tells you what to expect on a transition altitude.
Lowest QNH
1009 hPa
Oct 1, 2026
Highest QNH
1022 hPa
Sep 17, 2026
Mean QNH
1015 hPa
572 archived observations · Archive updated continuously
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