Pack or skip
Beanie for San Antonio in December
Verdict
Pack it
Lows around 41°F — a beanie doubles the perceived warmth for zero grams.
Why
San Antonio in December averages highs of 63°F, lows of 41°F, 7 rainy days.
That climate means a beanie earns its space in the bag. Lows around 41°F — a beanie doubles the perceived warmth for zero grams.