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 temperature, precipitation, sun, humidity, wind and storms for San Antonio. 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
23 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 degrees Fahrenheit (21 degrees Celsius) in San Antonio. The city averages 6 days this month when the thermometer reaches into the 90s °F (over 32 °C). Temperatures above 100 °F (38 °C) are not expected here this time of year.

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

3.8 in total precipitation 95 mm
6 days of rain

Half the time, San Antonio receives 0.8 to 5.3 inches (20 to 133 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.


The weather data here are long-term averages provided by the US National Centers for Environmental Information (NCEI). Temperature and precipitation are 1991-2020 normals while humidity and thunderstorms are 1961-1990 normals. The named storm probabilities come from the Atlantic Oceanographic and Meteorological Laboratory, Hurricane Research Division.

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