About Sinton, TX's Climate & Weather History

Sinton is a city of approximately 5,700 people in Texas, United States. Located in the Central Time Zone at 28°N latitude.

In 2025, Sinton recorded an average annual temperature of 74°F — about 1.0°F above the 30-year normal of 73°F. The hottest day reached 100°F in September; the coldest was 24°F in January. Total precipitation was 35 inches (wetter than usual). The wettest month was March.