San Antonio weather in December
Long-run climate averages for San Antonio, TX in December, plus what the forecast models say for the days ahead.
In December, San Antonio averages 69°F by day and 50°F at night. The wettest month is usually May.
December in San Antonio averages a daytime high of 69°F and an overnight low of 50°F, which reads as mild for this part of the world. It is among the three coldest months of the year here. Across the whole year San Antonio sees roughly 36 inches of precipitation.
Climate averages tell you what to pack. They do not tell you what next Tuesday looks like — for that, see the live San Antonio forecast with every model compared and how much they currently agree.
San Antonio weather by month
what to expect in San Antonio through the yearHere is San Antonio's typical weather in each month: the average daytime high and overnight low in °F, how each month feels, and the wettest month marked. Use it to plan any trip to San Antonio by season.