San Antonio Weather in March

San Antonio, Texas enjoys some warm weather during March, along with spring breezes and low humidity.

This page gives detailed information on the typical March 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

74 °F March average high 23 °C
52 °F March average low 11 °C
23 days 70 °F max. or more (21 °C)
14 days 50 °F min. or less (10 °C)

The temperature rises nearly every day in March to over 60 degrees Fahrenheit (16 degrees Celsius) in San Antonio. The city averages ten days this month when the thermometer reaches into the 80s °F (over 27 °C). In some years, March can get as hot as 90 °F (32 °C).

The thermometer typically dips to 40 °F (4 °C) or below on 4 nights. Typically one of those nights has frost.

Rainy Weather iconRain

2.3 in total precipitation 59 mm
9 days of rain

Half the time, San Antonio receives 1.1 to 2.9 inches (28 to 75 mm) of rainfall in March. One in four years has drier weather, while another one in four is wetter.

Sunny Weather iconSun

57 % sunshine
9 days clear skies

The sun's rays reach the ground in San Antonio during 57 percent of daylight hours on average in March, for a total of 212 hours in the month. Typically on 9 days this month the sky is mainly clear, with at most 30 percent cloud cover.

Sunlight in March at San Antonio lasts for 12 hours a day on average. The shortest day of the month is the 1st with 11 hours and 34 minutes of daylight. By the end of the month, the days have lengthened to 12:28 from sunrise to sunset. These durations can vary by a minute or two from year to year.

Humid Weather iconHumidity

63 % March average humidity

The relative humidity in San Antonio during March usually peaks at 79 percent in the morning then drops to 46 percent by mid afternoon.

Local Time12 am3 am6 am9 am12 pm3 pm6 pm9 pm
Humidity % 72 77 79 70 54 46 47 61

Windy Weather iconWind

10.1 mph March wind speed average 16.3 kph

March is one of the windiest months in San Antonio.

Stormy Weather iconStorms

1 day rainfall of 0.5 inches (13 mm) or more
2 days with thunderstorms in March

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.

San Antonio Weather
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