San Antonio weather in October
October in San Antonio: hot, a little rain, with clean air — an excellent time to visit.
#4 of 12 months in San Antonio · #206 of 604 destinations to visit in October · comfort 83/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
San Antonio climate normals — October
| Daytime high | 29°C / 84°F | 🥵 hot |
|---|---|---|
| Nighttime low | 18°C / 64°F | |
| Feels like (high) | 29°C / 84°F | |
| Rainfall | 70 mm / 2.7 in | 🌦 some rain |
| Rainy days | 8 days | |
| Humidity | 58% | 🍃 comfortable |
| Dew point | 13°C / 56°F | |
| Sunshine | 9.2 h/day | |
| Daylight | 11.5 h | |
| Wind | 17 km/h / 10 mph | |
| Air quality (US AQI) | 37 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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San Antonio in October — FAQ
- Is October a good time to visit San Antonio?
- October in San Antonio: hot, a little rain, with clean air — an excellent time to visit. It ranks #4 of 12 months for San Antonio on SeasonMap's comfort score (83/100).
- What is the weather like in San Antonio in October?
- In October, San Antonio averages a daily high of 28.8°C and a low of 18°C, with about 69.5 mm of rain over roughly 7.8 rainy days.
- What is the air quality in San Antonio in October?
- San Antonio has a mean US Air Quality Index of about 37 in October.