KFGN temperature trend
Flag Island, MN, US
Temperature and dew point over time. The gap between them is what decides fog, and the temperature itself is what decides your density altitude and takeoff run.
Warmest
24 °C
Sep 10, 2026
Coldest
7 °C
Sep 16, 2026
Mean temperature
14.6 °C
Mean dew point
10.7 °C
824 archived observations · Archive updated continuously
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