San Antonio (TX) monthly weather averages

  • Average daytime temperature

    The bar chart below shows the average monthly peak daytime temperatures at San Antonio

    San Antonio average temperature chart
    Average monthly temperatures in San Antonio (degrees centigrade and fahrenheit)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    °C 15.8 18.4 22.6 27.1 29.6 32.8 34.8 35 31.7 27.3 22.1 17.6
    °F 60.4 65.2 72.6 80.7 85.3 91.1 94.7 94.9 89 81.1 71.8 63.7

    Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

  • Average rainfall & rainy days

    The graph below shows the average rainfall and number of rainy days per month.

    Average monthly rainfall in San Antonio (mm and inches)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    mm 38 53 37 59 94 73 39 55 90 73 50 38
    inches 1.5 2.1 1.4 2.3 3.7 2.9 1.5 2.2 3.5 2.9 2 1.5
    Rainy days 8 7 7 7 9 6 5 5 7 7 6 7
  • Average daily sunshine

    The bar chart below shows the average daily sunshine hours in San Antonio

    Average daily sunshine San Antonio
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    Hrs sunshine 5.5 6.4 7.2 7.3 7.6 9.8 10.6 10 8.3 7.5 6.1 5.2
  • Day / night temperatures

    The graph below shows the daily range of temperatures for each month.

    Maximum and minimum daily temperatures in San Antonio (degrees centigrade and fahrenheit)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    Min °C 3.3 5.3 9.5 15.1 18.7 22.1 23.5 23.2 20.5 14.6 9.4 5.1
    Max °C 16.1 18.8 22.9 27.4 29.9 33.1 35.1 35.3 32 27.6 22.4 17.9
    Min °F 37.9 41.5 49.1 59.1 65.7 71.8 74.3 73.7 68.8 58.3 48.9 41.2
    Max °F 49.5 53.6 61.2 70.2 75.7 81.7 84.7 84.6 79.2 70 60.6 52.7
  • Sea temperature

    The graph below shows the average sea temperature.

    Average sea temperature around San Antonio in degrees centigrade and fahrenheit
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    °C 17.8 17.3 18.3 20.7 24 27.2 28.8 29.4 28.8 26.1 22.6 19.7
    °F 64.1 63.1 64.9 69.2 75.2 81 83.9 85 83.8 79 72.8 67.5
  • Wind speed

    The graph below shows the average wind speed.

    Average wind speed in San Antonio (mph and kmh)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    km/h 16 17 18 18 17 17 16 15 15 15 16 15
    mph 10 11 11 11 11 10 10 9 9 9 10 9

    A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

  • Relative humidity

    The graph below shows the average relative humidity.

    Average relative humidity in San Antonio
    Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    68% 66% 64% 66% 71% 69% 65% 65% 69% 68% 69% 69%

Other monthly averages

UV index

San Antonio weather stats

San Antonio weather statistics
Hottest month: July 34.8°C 94.6°F
Driest month: March 37mm 1.5ins
Sunniest month: July 10.6hrs
Coldest month: January 15.8°C 60.4°F
Wettest month: May 94mm 3.7ins
Warmest sea: August 29.4°C 84.9°F
Map showing location of San Antonio (29.42412, -98.49363)

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