Typical Weather in San Antonio, TX in December
64° F Avg High
40° F Avg Low
4 Rainy Days
☀️ Temperature Summary
December is one of the cooler months of the year for San Antonio, with highs averaging around 64°F. You can expect overnight lows near 40°F most days.
December is a great time to visit San Antonio, with mild temperatures and sunny days being very common.
High Temps Throughout the Year
🎒 What to Pack
Pick up a few of these items to keep your trip fun and comfortable.
☔ Rain Summary
In December you can expect close to a 12% chance of rain for any given day. It rains less than usual in December, with total rainfall for the month typically near 2 inches.
Rainfall Throughout the Year
Planning a trip to San Antonio? Try our free trip weather planner