Lavaca County: Full of the same features that make South and South Central Texas so memorable, Lavaca County is host to rolling hills, tall grasses, oak, mesquite, and elm in abundance. Nearly 30 percent of the land in Lavaca is considered prime farmland and thus contributes to the thriving population of wildlife and scenic vistas. Summers are warm and winters are mild leading to an average yearly temperature of 70? F. Coupled with a 278 day growing season Lavaca is sure to please either the most industrious of farms or merely the hearty green thumb.