average monthly temps in san antonio
The highest monthly average temperature in San Antonio for August is 86 degrees. The lowest monthly average temperature in San Antonio for December is 55 degrees. The most monthly precipitation in San Antonio occurs in March with 3.1 inches. The air quality index in San Antonio is 9% better than the national average. The pollution index in San Antonio is 374% worse than the national average.
San Antonio: Annual Weather Averages. July is the hottest month in San Antonio with an average temperature of 25Â°C (77Â°F) and the coldest is January at 11Â°C (52Â°F) with the most daily sunshine hours at 10 in July. The wettest month is October with an average of 66mm of rain. The best month to swim in the sea is in August when the average sea temperature is 26Â°C (79Â°F).