You see that hole in the map where the heat has burned through part of south Texas? That’s San Antonio.
Actually, the weather in San Antonio is not that bad in February. The temperature rises nearly every day during February to over 50 °F (10 °C). The city averages 3 days this month when the thermometer reaches into the 80s °F (over 27 °C). Temperatures above 90 °F (32 °C) happen only rarely in February. Although uncommon, February can get as cold as 20 °F (-8 °C). Expect the temperature to be around 70 °F (21 °C) during the day dipping to 50 °F (10 °C) in the evening.
February is a little windier than most other months in San Antonio. with average wind speeds between 9.3 mph (15 kph) and 15 mph (21 kph.) The relative humidity in San Antonio during February usually peaks at 80 percent in the morning then drops to 48 percent by mid afternoon. Chance of rain is slight, with the average precipitation less than 2 inches (51 mm) falling over one or two days.
Austin is only 90 miles north of San Antonio, so the cartoon below applies here in February. Bring layers!