San Antonio Weather in October

In most years San Antonio, Texas sees another spike in rainy weather during October. Even so, many days this month are dry and the temperature quite pleasant.

This page gives detailed information on the typical October weather for San Antonio.

You can jump directly to data and descriptions for:

The numbers here are historical averages based on climate data gathered at the San Antonio International Airport, located a few miles north of the city center.

Temperature Weather iconTemperature

82 °F October average high 28 °C
60 °F October average low 16 °C

In most years, San Antonio averages a daily maximum temperature for October that's between 80 and 84 degrees Fahrenheit (27 to 29 degrees Celsius). The minimum temperature usually falls between 58 and 63 °F (14 to 17 °C).

The days at San Antonio continue to cool quickly during October. By the end of the month, the temperature has dropped around 8 °F (5 °C) below what it was at the start.

21 days 80 °F max. or more (27 °C)
15 days 60 °F min. or less (16 °C)

Nearly every October day warms to over 70 °F (21 °C) in San Antonio. The city averages 4 days this month when the thermometer reaches into the 90s °F (over 32 °C). Temperatures above 100 °F (38 °C) are not expected here during October.

The thermometer dips to 50 °F (10 °C) or below on an average of 5 nights. October does not normally get frost.

Rainy Weather iconRain

4.1 in total precipitation 104 mm
7 days of rain

Half the time, San Antonio receives 1 to 6 inches (22 to 151 mm) of rainfall in October. One in four years has drier weather, while another one in four is wetter.

Sunny Weather iconSun

64 % sunshine
11 days clear skies

The sun's rays reach the ground in San Antonio during 64 percent of daylight hours on average in October, for a total of 227 hours in the month. Typically on 11 days this month the sky is mainly clear, with at most 30 percent cloud cover.

Sunlight in October at San Antonio lasts for 11 hours and 26 minutes a day on average. The longest day of the month is the 1st with 11 hours and 52 minutes of daylight. By the end of the month, the days have shortened to 11:02 from sunrise to sunset. These durations can vary by a minute or two from year to year.

Humid Weather iconHumidity

67 % October average humidity

The relative humidity in San Antonio during October usually peaks at 84 percent in the morning then drops to 47 percent by mid afternoon.

Local Time12 am3 am6 am9 am12 pm3 pm6 pm9 pm
Humidity % 77 82 84 72 55 47 52 68

Windy Weather iconWind

8.3 mph October wind speed average 13.4 kph

October is one of the least windy months for San Antonio.

Stormy Weather iconStorms

2 days rainfall of 0.5 inches (13 mm) or more
3 days with thunderstorms in October
2 % chance a named storm approaches

There's a 2 percent probability that a named tropical storm will approach within 100 miles (165 km) of San Antonio during October, and it's likely to be a category 1 or 2 hurricane. Major hurricanes are not expected this time of year.


These weather data are long-term historical averages provided by the National Climatic Data Center of the United States. The temperature and precipitation numbers are 1981-2010 normals while the humidity and thunderstorm statistics are 1961-1990 normals. The named storm probabilities come from the Atlantic Oceanographic and Meteorological Laboratory, Hurricane Research Division.

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