October is one of the warmer months of the year in San Antonio, with average highs near 28.3°C and lows around 15.7°C (mean 22°C). It is a relatively wet time of year, averaging 87 mm of rainfall and 67% relative humidity across the period.
October is one of the warmer months of the year in San Antonio. Across 45 years of records, the warmest October in San Antonio was 2024 — when the month averaged 26.5°C — while the coldest was 2009 at 19.8°C. Typical October days reach 28.3°C with nights near 15.7°C. The long-term trend is warming, about 0.5°C per decade.
October is a relatively wet time of year in San Antonio, averaging 87 mm of rainfall. The wettest October on record was 1998 with 307 mm, while the driest was 2024 at 0 mm.
Relative humidity in San Antonio during October averages 67%. The most humid October was 2018 at 84%, and the least humid was 2024 at 50%.
October receives about 4.3 kWh/m²/day of solar energy in San Antonio. The sunniest October was 2010 at 5.2 kWh/m²/day, and the cloudiest was 1984 at 2.8.
Average wind speed in San Antonio during October is 2.6 m/s. The windiest October was 1985 at 3.1 m/s, while the calmest was 2016 at 2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 21.4°C | 21.6°C | 21.5°C | 22.1°C | 24.0°C | +2.6°C |
| Avg High | 27.4°C | 28.1°C | 27.6°C | 28.5°C | 31.0°C | +3.6°C |
| Avg Low | 15.5°C | 15.1°C | 15.5°C | 15.7°C | 17.1°C | +1.6°C |
| Avg Rain | 105 mm | 97 mm | 102 mm | 69 mm | 45 mm | -60 mm |
October temperatures in San Antonio have risen by about 2.9°C between 1981–1985 and 2021–2025.
October has ranged from a record low of -1.9°C (1993) to a record high of 38°C (2024).
Rainfall in October is a relatively wet time of year, averaging 87 mm, with a wettest year of 307 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.7°C per decade while lows rose 0.3°C per decade, widening the gap between day and night.
One of the best times to visit San Antonio
October is one of the best times to visit San Antonio. Expect days averaging 28.3°C and nights around 15.7°C (mean 22°C) — warmer than San Antonio's yearly average — with higher rainfall (87 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 33.0°C | 25.7°C | 18.5°C | 36.6°C | 5.7°C | 35 mm | 52% | 2.2 m/s | 4.9 |
| 2024 🔥 | 34.0°C | 26.5°C | 19.0°C | 38.0°C | 12.7°C | 0 mm | 50% | 2.3 m/s | 4.9 |
| 2023 | 29.3°C | 23.2°C | 17.1°C | 35.7°C | 4.5°C | 92 mm | 65% | 2.8 m/s | 3.8 |
| 2022 | 30.1°C | 22.9°C | 15.7°C | 35.7°C | 7.8°C | 31 mm | 53% | 2.5 m/s | 4.8 |
| 2021 | 29.2°C | 23.2°C | 17.2°C | 33.7°C | 9.7°C | 106 mm | 70% | 2.4 m/s | 4.7 |
| 2020 | 30.2°C | 22.7°C | 15.1°C | 36.7°C | 4.8°C | 4 mm | 62% | 2.7 m/s | 4.6 |
| 2019 | 29.1°C | 22.1°C | 15.1°C | 37.2°C | 0.9°C | 73 mm | 58% | 2.9 m/s | 4.3 |
| 2018 | 24.6°C | 20.2°C | 15.8°C | 30.3°C | 8.0°C | 133 mm | 84% | 2.8 m/s | 3.4 |
| 2017 | 27.5°C | 21.0°C | 14.4°C | 33.2°C | 2.5°C | 23 mm | 65% | 2.3 m/s | 4.6 |
| 2016 | 29.7°C | 23.4°C | 17.1°C | 33.5°C | 10.2°C | 3 mm | 71% | 2 m/s | 4.9 |
| 2015 | 30.6°C | 24.2°C | 17.8°C | 37.3°C | 11.2°C | 193 mm | 58% | 2.8 m/s | 4.4 |
| 2014 | 30.4°C | 23.6°C | 16.7°C | 34.4°C | 10.8°C | 37 mm | 65% | 2.5 m/s | 4.9 |
| 2013 | 27.3°C | 21.6°C | 15.8°C | 33.2°C | 6.8°C | 129 mm | 74% | 2.6 m/s | 4.3 |
| 2012 | 27.7°C | 21.4°C | 15.2°C | 33.7°C | 5.5°C | 27 mm | 69% | 2.8 m/s | 4.3 |
| 2011 | 28.6°C | 21.5°C | 14.3°C | 34.3°C | 4.9°C | 69 mm | 63% | 2.6 m/s | 5 |
| 2010 | 29.5°C | 22.0°C | 14.5°C | 34.0°C | 8.1°C | 2 mm | 58% | 2.5 m/s | 5.2 |
| 2009 ❄️ | 25.3°C | 19.8°C | 14.3°C | 32.5°C | 5.6°C | 193 mm | 79% | 2.9 m/s | 3.8 |
| 2008 | 29.7°C | 22.3°C | 14.8°C | 35.2°C | 5.7°C | 22 mm | 57% | 2.7 m/s | 4.8 |
| 2007 | 29.4°C | 22.5°C | 15.7°C | 32.9°C | 6.3°C | 32 mm | 66% | 2.5 m/s | 4.9 |
| 2006 | 28.5°C | 22.0°C | 15.4°C | 34.2°C | 7.7°C | 57 mm | 68% | 2.6 m/s | 4.2 |
| 2005 | 28.7°C | 22.0°C | 15.4°C | 35.9°C | 5.5°C | 55 mm | 63% | 2.6 m/s | 4.4 |
| 2004 | 28.8°C | 23.8°C | 18.7°C | 32.8°C | 10.7°C | 186 mm | 79% | 2.5 m/s | 4 |
| 2003 | 27.4°C | 21.3°C | 15.1°C | 32.4°C | 7.3°C | 69 mm | 73% | 2.3 m/s | 4.2 |
| 2002 | 25.4°C | 20.6°C | 15.9°C | 33.1°C | 7.9°C | 213 mm | 82% | 2.5 m/s | 3.5 |
| 2001 | 26.6°C | 19.9°C | 13.1°C | 33.9°C | 5.2°C | 53 mm | 71% | 2.8 m/s | 4.7 |
| 2000 | 25.8°C | 21.1°C | 16.4°C | 35.7°C | 5.2°C | 145 mm | 79% | 3 m/s | 3.1 |
| 1999 | 29.5°C | 22.1°C | 14.7°C | 34.8°C | 6.5°C | 34 mm | 56% | 2.7 m/s | 4.7 |
| 1998 🌧️ | 26.5°C | 21.4°C | 16.4°C | 34.1°C | 7.4°C | 307 mm | 81% | 3 m/s | 3.9 |
| 1997 | 26.5°C | 20.7°C | 15.0°C | 35.4°C | 3.0°C | 114 mm | 72% | 2.7 m/s | 4.1 |
| 1996 | 28.0°C | 21.5°C | 15.1°C | 32.6°C | 5.9°C | 28 mm | 71% | 2.7 m/s | 4.1 |
| 1995 | 29.6°C | 22.3°C | 15.0°C | 35.1°C | 9.7°C | 41 mm | 56% | 2.7 m/s | 4.7 |
| 1994 | 26.7°C | 21.2°C | 15.7°C | 35.1°C | 7.9°C | 196 mm | 77% | 2.4 m/s | 4.1 |
| 1993 | 27.4°C | 20.8°C | 14.1°C | 35.5°C | -1.9°C | 107 mm | 64% | 2.8 m/s | 4.3 |
| 1992 | 30.8°C | 23.4°C | 16.0°C | 34.5°C | 11.1°C | 44 mm | 57% | 2.4 m/s | 4.3 |
| 1991 | 28.6°C | 22.2°C | 15.8°C | 35.0°C | 4.3°C | 37 mm | 67% | 2.6 m/s | 4.5 |
| 1990 | 27.8°C | 20.5°C | 13.3°C | 34.5°C | 4.5°C | 64 mm | 65% | 2.4 m/s | 4.7 |
| 1989 | 28.3°C | 21.2°C | 14.2°C | 36.4°C | 3.2°C | 97 mm | 63% | 2.5 m/s | 4.7 |
| 1988 | 29.8°C | 22.9°C | 15.9°C | 32.9°C | 11.5°C | 26 mm | 62% | 2.4 m/s | 4.7 |
| 1987 | 29.4°C | 21.9°C | 14.5°C | 33.9°C | 9.5°C | 10 mm | 57% | 2.6 m/s | 4.8 |
| 1986 | 25.2°C | 20.1°C | 14.9°C | 35.6°C | 7.6°C | 201 mm | 79% | 2.5 m/s | 3.7 |
| 1985 | 26.4°C | 21.2°C | 16.0°C | 31.6°C | 7.3°C | 124 mm | 76% | 3.1 m/s | 3.7 |
| 1984 | 26.1°C | 21.6°C | 17.1°C | 32.0°C | 8.4°C | 184 mm | 82% | 2.8 m/s | 2.8 |
| 1983 | 28.0°C | 21.8°C | 15.6°C | 34.2°C | 9.6°C | 60 mm | 73% | 2.6 m/s | — |
| 1982 | 27.1°C | 21.1°C | 15.0°C | 35.1°C | 6.5°C | 82 mm | 68% | 2.7 m/s | — |
| 1981 | 26.6°C | 21.2°C | 15.9°C | 33.9°C | 5.7°C | 162 mm | 76% | 3 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 28.3°C with lows near 15.7°C (mean 22°C), based on 45 years of NASA POWER data.
October averages 87 mm of rainfall in San Antonio, a relatively wet time of year. The wettest on record was 307 mm in 1998.
The hottest October reached 38°C in 2024. The coldest dipped to -1.9°C in 1993.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 2.9°C. Daytime highs moved from 26.8°C to 31.1°C and overnight lows from 15.9°C to 17.5°C over the same span.
October is one of the warmer months of the year in San Antonio and a relatively wet time of year, so plan for around 28.3°C daytime highs and 15.7°C at night.
Not quite — October is the 7th coolest month in San Antonio, averaging 22°C.
For October in San Antonio, pack light layers you can adjust through the day, with typical highs of 28.3°C and lows of 15.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in October averages 67% — moderately humid.
Average wind speed in October is 2.6 m/s. The windiest October on record averaged 3.1 m/s (1985).
The wettest October on record was 1998 with 307 mm. On average, October sees 87 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in San Antonio behaves each October, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for October specifically, along with year-by-year records and how the month has changed over the decades.
