San Antonio (TX) monthly weather averages

Contents

Average daytime temperature

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

San Antonio average temperature chart (Celsius) San Antonio average temperature chart (Fahrenheit)
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.

San Antonio monthly rainfall chart (mm) San Antonio monthly rainfall chart (inches)
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 annual rainfall in San Antonio: 630.6mm (248.3 inches)

Average daily sunshine

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

San Antonio average daily sunshine chart
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.

San Antonio average minimum / maximum temperatures (Celsius) San Antonio average minimum / maximum temperatures (Fahrenheit)
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.

San Antonio average sea temperature chart (Celsius) San Antonio average sea temperature chart (Fahrenheit)
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.

San Antonio average winspeed by month (km/h) San Antonio average winspeed by month (mph)
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.

San Antonio relative humidity averages
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

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Beta

Current (hourly) weather 15 day forecast

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) San Antonio map pin © Google

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