Sun Dec 21st, '25 - Daily Weather for San Antonio

Happy Sunday! Here’s your weather for Sunday, December 21, 2025, in beautiful San Antonio. Enjoy the day ahead! - Morning starts cooler at 50 degrees, ideal for a cozy start. - Daytime high of 76 degrees, perfect for outdoor activities. - Low humidity at 27% for a comfortable feel. - Skies are clear; no need for an umbrella. - Gentle north wind at 5 mph. - Evening cools to 68 degrees, great for a River Walk stroll or barbecue. - Night temperature settles at 62 degrees under clear skies. - Explore San Antonio’s culture and historic sites with lovely weather. Have a fantastic day and join us again tomorrow for more updates.