San Antonio Temperatures: Averages by Month
The numbers here tell you how hot and cold the weather usually is in San Antonio, Texas during each month of the year.
The average high and low temperatures are listed below by month and annually for San Antonio, in both degrees Fahrenheit and Celsius.
Maximums and minimums are only part of the temperature picture. To fill in the rest, there's information on how many days a month get above or below a given temperature.
To find out how often it rises over 70, 80 or 90 °F each month in San Antonio, scroll down farther. There are also counts of nights with warm temperatures and days with cold weather.
All the numbers are averages, based on climate data gathered from 1981 to 2010.
|High °F||Low °F||High °C||Low °C|
Days of Hot Weather in San Antonio
Normally every day from April to October in San Antonio is above 60 degrees Fahrenheit, as are most days in winter months. Summer temperatures top 79 degrees every day and remain above 69 degrees most nights.
San Antonio sees an average of eight days a year with 100-plus degree temperatures.
How Often San Antonio Has Cold Temperatures
San Antonio averages 16 days a year of freezing weather, with one day a year dropping to 20 °F. Freezing temperatures normally occur from November to March.
But no matter how cold the night gets, the weather in San Antonio thaws during the day.
National Climatic Data Center. NOAA's 1981-2010 Climate Normals.