Will I need a jacket in San Antonio in January?

Yes — average lows hit about 40°F, so plan on a warm jacket and a sweater layer.

What to Pack for San Antonio in January — 2026 Packing List

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San Antonio's January lows of 40°F require a solid outer layer for morning visits to the Alamo before the sun fully warms the plaza.
Jeans are a staple for the Texas heritage casual style in San Antonio and provide necessary warmth during 62°F afternoons.
A long-sleeve flannel is perfect for the 8 days of occasional drizzle often seen in San Antonio's mid-winter climate.
Layering a sweater over a tee allows you to adjust as San Antonio temperatures climb from morning lows to daytime highs of 62°F.

Durable leather boots fit the San Antonio style and keep feet dry during the 8 days of precipitation expected in January.
You will need supportive shoes for the miles of walking along the San Antonio River Walk, even in the cooler 62°F weather.
Keeping your feet warm is essential when San Antonio temperatures dip to 40°F in the early hours of a winter morning.

A beanie helps retain heat during cold 40°F nights in San Antonio, especially if you are outdoors at a Pearl District event.
A scarf provides extra warmth against the humid winter air of San Antonio without being too bulky for 62°F afternoons.
San Antonio's Texas heritage casual style at 62°F January highs calls for a quality leather belt — it completes the polished-casual look appropriate for River Walk restaurants and the Pearl District's weekend markets.

With 8 rainy days in January, San Antonio visitors should carry an umbrella to navigate outdoor sites like the missions.
A small pack is useful for storing layers as San Antonio warms up by 22 degrees from morning to afternoon.
San Antonio averages 8 rainy days in January — a compact umbrella fits any bag for River Walk strolls and Alamo Plaza visits where the open stone pavement offers no shelter from sudden showers.

Visit the Pearl District on weekends for the farmer's market; January mornings at 40°F are crisp but perfect for hot coffee outdoors.

The River Walk is less crowded in January, but the sunken promenade can feel damp and cooler than street level when it is 62°F.

Check out the San Antonio Museum of Art if one of the 8 rainy days disrupts your outdoor plans.

Yes — average lows hit about 40°F, so plan on a warm jacket and a sweater layer.
Check out the San Antonio Museum of Art if one of the 8 rainy days disrupts your outdoor plans.
The River Walk is less crowded in January, but the sunken promenade can feel damp and cooler than street level when it is 62°F.