Business Casual
Navy Trench and Shorts
A navy trench coat over khaki bermuda shorts and a blue linen blouse works between seasons on a mild rainy day. Black pointed-toe heels sharpen what could easily be too casual.
What to Wear in San Antonio in December
December in San Antonio is mild with highs averaging 63°F and lows near 41°F — cool enough for a jacket or light coat but rarely severe. The River Walk's Christmas lights and the historic Market Square draw large crowds in comfortable afternoon temperatures; a medium-weight jacket handles the cooler evenings when the temperature drops from the mid-60s to the low 40s. About 7 days bring rain, so a water-resistant layer is worth packing.
What to wear
top / Long-Sleeve Top
fitted long-sleeve
lightweight layer for mild temps
bottom / Jeans
straight-leg
chinos for a slightly smarter look
footwear / Waterproof Boots
ankle boots
rubber sole for traction — keep feet dry all day
outerwear / Rain Jacket
shell jacket
waterproof or DWR-treated — keep it packable
Consider bringing:
Umbrella
Based on typical December conditions in San Antonio. Weather varies year to year — check the live forecast when you're within two weeks of your trip.
San Antonio in December is one of the most atmospheric months in the city — the River Walk's holiday lights reflect in the San Antonio River, the Market Square hosts its Mercado holiday festivities, and the missions trail is at its quietest and most accessible. Highs average a pleasant 63°F with lows near 41°F, and the 20°F daily swing means mornings call for a jacket that afternoons won't need. About 7 days of rain fall in December, typically as brief, warm-front Gulf showers rather than cold fronts. The local style tendency runs relaxed and Southern — medium-weight denim jackets or trench coats over casual tops, comfortable boots or sneakers for the River Walk's stone paths, and layers that work for both outdoor exploration and the city's lively restaurant and honky-tonk scene on Commerce Street. Visitors rarely need heavy winter gear; what San Antonio December demands is flexibility for the daily temperature range rather than insulation for extreme cold.
Curated Looks
Casual
Olive Anorak Trousers
An olive anorak handles mild rain without abandoning the polish of wide-leg navy trousers underneath. The crossbody stays tucked and close.
Chic
Cream Puffer Wide-Leg
A cream oversized puffer over a navy striped cardigan and wide-leg ivory linen trousers handles mild rain with a considered mix of textures. Black ballet flats are the restrained finish.
Cozy
Parka Cable Knit Mules
A black longline parka over a cable knit sweater in mild rain keeps warmth without overdressing. Black mule heels under leggings are an unexpected and intentional detail.
Cute
Blush Jacket Knit Skirt
A blush cropped jacket over a grey cardigan and black sweater mini skirt handles mild rain with charm. A black bucket bag and ankle boots keep the proportions balanced.
Formal
Grey Coat Wide-Leg
A grey longline coat over an ivory blouse and black wide-leg trousers handles mild rain without losing formal intent. Black Chelsea boots and a mini bag keep it focused.
Sporty
Cargo Rain Jacket
A black rain jacket over an oversized graphic tee and olive cargo trousers handles mild rain practically. White lace-up booties finish the look with enough contrast to lift the palette.
Packing List
What to Pack for San Antonio in December →
Other Months in San Antonio
Frequently Asked Questions
What should I wear in San Antonio in December?+
A medium-weight jacket or light coat handles the range from cool mornings near 41°F to mild afternoons at 63°F. Layer a long-sleeve or light sweater underneath for flexibility. Comfortable walking shoes or low boots work well for the River Walk's stone paths and the limestone streets around the Alamo and Mission Concepción. A water-resistant layer is useful for the occasional Gulf shower.
Is December a good time to visit San Antonio?+
December is one of San Antonio's best months. The River Walk's holiday lights are spectacular, the Market Square Mercado is at peak festive atmosphere, and the five Spanish colonial missions along the Mission Trail are accessible without summer heat. Hotel prices remain reasonable outside of the Christmas week peak. The weather is reliably mild and comfortable for outdoor exploration.
What shoes are best for San Antonio in December?+
Comfortable walking shoes or ankle boots handle the River Walk's uneven stone paths and the limestone and cobblestone surfaces around the missions and downtown historic district. Flat-soled or low-block-heel boots give the most traction on wet stone after rain. Avoid very high heels on the River Walk — the path narrows and the stone surface becomes slippery when wet.
How cool does it get in San Antonio in December?+
Daytime highs average 63°F, with overnight lows around 41°F. Cold fronts occasionally push temperatures into the 30s for a day or two, but sustained cold is uncommon. The daily swing from 41°F mornings to 63°F afternoons is one of December's most noticeable features in San Antonio — visitors who over-dress for morning cold often find themselves carrying a jacket by noon.
What should I pack for San Antonio in December?+
Pack a medium-weight jacket or coat, versatile long-sleeve tops and light sweaters, comfortable walking shoes or ankle boots, and a water-resistant layer for the occasional rain. You don't need heavy winter gear — San Antonio's December is genuinely mild. A scarf adds warmth for cooler evenings along the River Walk and doubles as a stylistic accessory in the city's festive December atmosphere.