Weather in San Antonio, Texas, United States in December
In an average December, San Antonio sees a daily high around 65°F and a low around 42°F, based on 1981–2026 of local climate records.
| Average high | 65°F |
|---|---|
| Typical high range | 51°F to 77°F |
| Average low | 42°F |
| Typical low range | 31°F to 56°F |
| Average daily precipitation | 0.10 in |
December records
The most extreme December on record for each metric, across 1981–2026. For rainfall, the wettest and driest are by total December accumulation.
High
Highest
89°F
2024-12-30
Lowest
27°F
1983-12-24
Low
Highest
66°F
2015-12-12
Lowest
9°F
1989-12-23
Feels-like
Highest
94°F
2025-12-26
Lowest
-9°F
1989-12-23
Humidity
Highest
17.9 g/m³
2015-12-26
Lowest
1.0 g/m³
1989-12-23
Wind
Highest
32 mph
2016-12-17
Lowest
5 mph
1986-12-20
Precip
Wettest
12.29 in
1991
Driest
0.12 in
2004
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