CYOW temperature trend
Ottawa Macdonald-Cartier International Airport
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
25 °C
Sep 13, 2026
Coldest
4 °C
Sep 24, 2026
Mean temperature
15.3 °C
Mean dew point
9.7 °C
514 archived observations · Archive updated continuously
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