San Antonio Weather Forecast 2025 Forecast. Myforecast is a comprehensive resource for online weather forecasts and reports for over 72,000 locations worldcwide. Discover the most accurate weather forecast for san antonio in january 2025.

This morning because wind chills were expected to be anywhere from 15 to 20 degrees across the hill. Get the monthly weather forecast for san antonio, tx, including daily high/low, historical averages, to help you plan ahead.