Frost dates in San Antonio, TX

The average last spring frost in San Antonio is around February 21 and the first fall frost is around November 28. That gives San Antonio an average growing season of about 281 days.

Last spring frost

Early (10% chance after)February 1
Average (50%)February 21
Late (90%)March 9

First fall frost

Early (10%)November 1
Average (50%)November 28
Late (90% chance before)December 11

See the San Antonio planting calendar →