San Antonio, get ready for a weekend of dramatic weather changes that could throw a wrench in your plans. Saturday will feel like the perfect spring day, with warm sunshine and temperatures soaring into the 80s. But don’t let the beautiful weather fool you—Sunday will bring a sudden drop in temperatures and the threat of thunderstorms, some of which could be severe. If you’re making outdoor plans, enjoy the warmth on Saturday because by Sunday, it could be a completely different story.
Saturday’s Forecast: Warm, Sunny, and Perfect for Outdoor Plans
On Saturday, March 1, San Antonio will be basking in the sun, with highs reaching 83°F (28°C). The skies will be mostly clear, and a light breeze will make it feel even more comfortable. It’s the kind of weather that makes you want to fire up the grill, go for a hike, or enjoy a patio brunch.
This is a rare “perfect weather” day for San Antonio in early March, so if you’ve been waiting for a good day to be outside, this is it. But before you get too comfortable, be aware of what’s coming next.
Sunday’s Forecast: The Calm Before the Storm – A Cold Front and Possible Severe Weather
By Sunday, March 2, everything changes. A powerful cold front is set to move through the area, causing temperatures to plummet nearly 20 degrees in just a few hours. The high will only reach around 64°F (18°C), and that’s not even the worst part.
As the front moves in, storm clouds will start building, bringing rain, thunderstorms, and possibly severe weather. While it’s still uncertain how intense these storms will be, strong winds, lightning, and even hail are possible. If you have plans for Sunday, consider moving them indoors or keeping an eye on the sky.
Why Is This Happening?
This kind of dramatic weather shift happens when warm, humid air collides with a strong cold front moving in from the north. The clash of air masses often leads to unstable conditions, which can trigger strong thunderstorms and heavy rain.
Meteorologists are watching this system closely to determine just how severe these storms might get, but residents should stay prepared for sudden weather changes.

How to Stay Safe & Prepare for the Weather Shift
With such a drastic change in weather, it’s important to be ready for both the warmth on Saturday and the potential storms on Sunday. Here’s what you can do:
- For Saturday: Take advantage of the warmth! If you have outdoor plans, Saturday is your best bet for enjoying the sunshine. Just remember to stay hydrated and wear sunscreen.
- For Sunday: Stay weather-aware. If thunderstorms develop, have a plan in place in case conditions become severe. Charge your phone, keep an eye on weather alerts, and avoid outdoor activities during stormy periods.
- Secure loose objects. If winds pick up ahead of the storm, bring in patio furniture, decorations, and anything that could get blown away.
- Watch the roads. If rain moves in, drive cautiously and be aware of possible slick roads or flash flooding in low-lying areas.
Final Thoughts: A Tale of Two Days in San Antonio
San Antonio’s weekend weather will be a game of two halves—Saturday will be warm, sunny, and perfect, while Sunday will be cooler, cloudier, and possibly stormy. If you’re looking for a great day to be outside, Saturday is your golden opportunity. By Sunday, however, you’ll want to be ready for a fast-moving cold front and the possibility of rain and storms.