KSEA pressure (QNH) trend
Seattle–Tacoma International Airport
The altimeter setting over time. Sharp falls mark approaching systems; the range tells you what to expect on a transition altitude.
Lowest QNH
1005 hPa
Sep 25, 2026
Highest QNH
1026 hPa
Sep 9, 2026
Mean QNH
1018 hPa
644 archived observations · Archive updated continuously
Advertisement
Sign up to browse without ads →
Advertisement