San Antonio weather in October
In October, San Antonio has an average high of 28 °C83 °F and an average low of 16 °C60 °F, with about 79 mm3.1 in of precipitation. It is the 6th warmest month of the year and ranks 3rd for precipitation.
How October compares with other months
Compared with September, October is 4.7 °C8.5 °F cooler on average and drier by 17 mm0.7 in. Compared with November, October is 5.6 °C10.1 °F warmer on average and wetter by 29 mm1.2 in. Daylight lasts about 11.4 hours around the middle of the month. Average relative humidity is 68% and the average cloud amount 41%.
Is October a good time to visit San Antonio?
Yes — October is one of the most comfortable months to visit San Antonio by our comfort score, which favours average highs of 21–28 °C, lows above 5 °C, little rain and moderate humidity.
What to wear in October
For San Antonio in October, pack light summer clothes such as T-shirts, shorts or light dresses and an extra layer for the cooler mornings and evenings.
October in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| San Antonio | 2883 | 1660 | 793.1 |
| Austin | 2882 | 1558 | 953.7 |
| Killeen | 2780 | 1457 | 963.8 |
| Corpus Christi | 2985 | 1966 | 592.3 |
| Piedras Negras | 3086 | 1762 | 451.8 |
| Ciudad Acuña | 3085 | 1662 | 461.8 |
| Nuevo Laredo | 3187 | 1864 | 441.7 |
| College Station | 2781 | 1558 | 1184.6 |
| Waco | 2780 | 1457 | 1124.4 |
Nearby places that are more than 1 °C1.8 °F warmer in October: Corpus Christi, Piedras Negras, Ciudad Acuña and Nuevo Laredo; cooler: Killeen, College Station and Waco.
Other months in San Antonio
- January17 °C63 °F / 5 °C40 °F
- February20 °C68 °F / 6 °C44 °F
- March24 °C76 °F / 11 °C51 °F
- April29 °C84 °F / 15 °C59 °F
- May32 °C89 °F / 19 °C67 °F
- June35 °C95 °F / 23 °C73 °F
- July36 °C96 °F / 24 °C75 °F
- August36 °C97 °F / 24 °C76 °F
- September32 °C90 °F / 21 °C70 °F
- October28 °C83 °F / 16 °C60 °F
- November23 °C73 °F / 10 °C50 °F
- December18 °C64 °F / 5 °C42 °F
Frequently asked questions
How warm is San Antonio in October?
In October the average high in San Antonio is 28 °C (83 °F) and the average low is 16 °C (60 °F).
Does it rain a lot in San Antonio in October?
On average about 79 mm (3.1 in) of precipitation falls in October; it ranks 3rd of the 12 months.
Is October the warmest month in San Antonio?
No. The warmest month in San Antonio is August, with an average high of 36 °C (97 °F). The coldest month is January, with an average low of 5 °C (40 °F).
How long is the day in San Antonio in October?
In the middle of October the day in San Antonio lasts about 11.4 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is San Antonio in October?
The average relative humidity in October is about 68%. This is a long-term average for the whole day.
How cloudy is San Antonio in October?
On average about 41% of the sky is covered by cloud in October. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 302 m, while San Antonio lies at about 198 m. Temperatures on this page were therefore adjusted by +0.7 °C1.2 °F using the standard lapse rate of 6.5 °C per 1,000 m.