Chilly Sunday: Bundle Up for San Antonio's Coolest Day in Weeks

Morning: A Crisp and Breezy Start

Residents of San Antonio waking up this Sunday, February 22, 2026, will notice a significant shift in the air. After a stretch of unseasonably warm February weather, a cold front has firmly established itself over the Hill Country. Early morning temperatures are hovering in the low 40s, specifically between 41°F and 44°F. However, thanks to persistent northeast winds, the real-feel temperature or wind chill is dipping into the upper 30s. If you are heading out to early church services or the local farmers' market, a heavy coat is highly recommended.

Despite the chill, the morning hours will remain mostly sunny. The dry air in place will allow the sun to do some work, pushing temperatures toward the mid-50s by 11:00 a.m. While the morning remains breezy, the intense gusts that triggered fire safety concerns yesterday have begun to taper off, though a steady wind from the north continues to remind us that winter isn't quite finished with South Texas yet.

Afternoon: Gradual Warming Under Sunny Skies

As we move into the afternoon, San Antonio will see its peak temperature for the day. Expect the mercury to top out at approximately 65°F. While this is significantly cooler than the 70s and 80s seen earlier this week, the abundance of sunshine will make for a pleasant, albeit brisk, afternoon for outdoor activities. This 65-degree high actually sits slightly below the seasonal average for late February, marking today as one of the chilliest days the Alamo City has experienced in several weeks.

The afternoon also marks a turning point for the local wind patterns. Meteorologists indicate that the gusty conditions will finally subside after midday, leading to much calmer winds by the late afternoon and early evening. This transition provides a perfect window for a walk along the River Walk or a visit to a local park before the clouds begin to roll in.

Evening: Increasing Clouds and a Slight Rain Chance

By Sunday evening, the clear blue skies will give way to increasing cloud cover. Temperatures will begin their descent back into the 50s shortly after sunset. While most of the day remains dry, there is a minor 10% chance of patchy rain or light showers developing late tonight as moisture levels begin to fluctuate. The humidity, which sat at a dry 26% during the day, will rise as the clouds thicken.

Key Weather Data and Warnings

• Temperature Range: A low of 41°F and a high of 65°F.
• Morning Conditions: Low 40s with wind chills in the 30s; northeast winds.
• Afternoon Conditions: Sunny with highs near 65°F; winds calming after 12:00 p.m.
• Evening Conditions: Increasing cloudiness; low of 42°F; 10% chance of precipitation.
• Warnings: No active Red Flag Warnings for Sunday, but residents should remain cautious of the chilly morning temperatures and lingering breezes.

Looking ahead, this cold snap is expected to be short-lived. High pressure currently developing across northern Mexico is slated to bring a rapid warm-up, with temperatures potentially reaching the 80s or even 90s by the middle of the coming week.