KGPC pressure (QNH) trend
Greencastle/Putnam Cnty, IN, US
The altimeter setting over time. Sharp falls mark approaching systems; the range tells you what to expect on a transition altitude.
Lowest QNH
1012 hPa
Sep 20, 2026
Highest QNH
1027 hPa
Sep 25, 2026
Mean QNH
1020 hPa
813 archived observations · Archive updated continuously
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