February Weather in San Antonio Texas, United States. Daily high temperatures increase by 7°F, from 65°F to 72°F, rarely falling below 51°F or exceeding 83°F. Daily low temperatures increase by 6°F, from 45°F to 51°F, rarely falling below 32°F or exceeding 65°F. IHUvM. San Antonio in February is characterized by gradual warming, an increase in the average hours of daylight, and a relatively low UV index. Limited downpours and an increase in cloud cover are also observed during this month. It's a month with an average maximum wind slightly higher, hitting 9.2mph.

weather in san antonio in february