San Antonio in December
8.7out of 10
Yes, a good time to go
Warm and comfortable: highs around 23°C. Very dry: about 3 rainy days.
23°CAvg high
15°CAvg low
3Rainy days (13 mm)
13:01 hDaylight
05:09Sunrise · 18:11 Sunset
Why this score
- Warm and comfortable: highs around 23°C
- Very dry: about 3 rainy days
What to wear and pack
- T-shirts and light layers
How reliable is the forecast?
Rain in December varies a lot between years (±3.4 rainy days), so check the forecast closer to your trip. Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 22°C | 15°C | 52 mm | 12 | – | – | 7.5 |
| February | 22°C | 15°C | 63 mm | 13 | – | – | 7.3 |
| March | 22°C | 15°C | 41 mm | 10 | – | – | 7.7 |
| April | 23°C | 15°C | 9 mm | 2 | – | – | 8.8 |
| May | 23°C | 14°C | 1 mm | 0 | – | – | 9.1 |
| June | 22°C | 13°C | 0 mm | 0 | – | – | 9.1 |
| July | 22°C | 13°C | 0 mm | 0 | – | – | 9.0 |
| August | 22°C | 13°C | 1 mm | 0 | – | – | 9.1 |
| September | 23°C | 14°C | 1 mm | 0 | – | – | 9.1 |
| October | 23°C | 15°C | 1 mm | 0 | – | – | 9.1 |
| November | 23°C | 14°C | 2 mm | 1 | – | – | 9.0 |
| December | 23°C | 15°C | 13 mm | 3 | – | – | 8.7 |
Frequently asked questions
How hot is San Antonio in December?
Daytime highs average 23°C and nights about 15°C.
When is the best time to visit San Antonio?
The best months are May, June, August, September.