What to Wear in San Antonio in Winter: Month-by-Month Outfit Guide
San Antonio in winter sits in the 40 to 70°F range. This is the layer-by-layer outfit guide for San Antonio's winter weather — what to wear, what to pack for a visit, and the local context that shapes the recommendations.
WHAT TO EXPECT
San Antonio in winter — December, January, February. December through February. 55-70°F highs, 40-55°F lows. Mild with occasional cold snaps. The temperature range is the headline; what you actually feel depends on humidity, wind, and what indoor spaces you'll cycle through.
THE FOUNDATION LAYER
A standard cotton or synthetic shirt is fine, with a long sleeve for the cold end of the range. The base layer is comfort, not survival.
THE MID LAYER
A cardigan, light fleece, or vest — pick based on whether you'll be active or stationary outdoors.
THE OUTERWEAR
Trench coat, light wool blazer, denim jacket, or a packable shell. Layer the outerwear, don't replace it.
ACCESSORIES
A scarf for cool mornings, a packable umbrella, and shoes you can walk in for an hour.
WHAT TO PACK FOR A TRIP TO SAN ANTONIO IN WINTER
Three layer permutations covering the 40 to 70°F range, plus accessories. If your trip spans the season's edge (late November or early March), pack toward the cooler end of the range — overestimating warmth is easier to recover from than underestimating.
LOCAL CONTEXT
Similar climate to Houston but slightly drier inland. Heat index manages most of the summer. AC contrast indoors is intense.