‹ San Antonio weather by month
Typical May weather
San Antonio
Texas · May
87° days
66° nights
about 5 rainy days · 13½ hours of daylight
What to pack
- Swimsuit
- Sunscreen
What May feels like
The wettest month here, and San Antonio sits in what forecasters call Flash Flood Alley — a stalled storm puts low crossings under fast, and those signs on the road are not decorative. In between, the mornings are lovely and the rivers are full.
Expect about 5 days with real rain — enough to notice, not enough to plan around. There’s a little humidity in the air, but nothing that changes your plans. about 12 afternoons top 90°.
The numbers
| Typical high | 87° |
|---|---|
| Typical low | 66° |
| Days with real rain | 5 |
| Total rain | 4.4 in |
| Humidity | a touch humid |
| Sunrise / sunset (mid-month) | 6:41 am / 8:19 pm |