CYSP pressure (QNH) trend
Marathon Airport
The altimeter setting over time. Sharp falls mark approaching systems; the range tells you what to expect on a transition altitude.
Lowest QNH
1001 hPa
Sep 12, 2026
Highest QNH
1031 hPa
Sep 18, 2026
Mean QNH
1018 hPa
207 archived observations · Archive updated continuously
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