KHYI temperature trend
San Marcos Regional 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
38 °C
Sep 15, 2026
Coldest
20 °C
Sep 27, 2026
Mean temperature
29.1 °C
Mean dew point
21.8 °C
624 archived observations · Archive updated continuously
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