San Antonio

San Antonio Braces for Unseasonably Warm Christmas with Highs Around 80 Degrees

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Published on December 23, 2025
San Antonio Braces for Unseasonably Warm Christmas with Highs Around 80 DegreesSource: Google Street View

San Antonio residents, expecting a typical chill for Christmas, may be surprised by the forecast this year. According to National Weather Service, the city will experience areas of dense fog particularly before 10am today. However, the fog is just a prelude to what comes next: a gradual clearing that will eventually reveal a mostly sunny sky with a high near 80 degrees. The light south wind around 5 mph won’t do much to cool things down, making it feel more like a spring day than one in late December.

The unexpected warm spell continues tonight with patchy fog rolling in after 2 am. The climb in temperature will persist, with a low around 66 degrees, and this mild weather will carry on through tomorrow, with Christmas Day forecasted to be partly sunny and reach up to 80 degrees. The constantly shifting veil of clouds, during the nights, will only briefly mask the stars above San Antonio amidst increasing clouds, with a low hovering around the mid-60s.

Moving into the weekend, Friday boasts mostly sunny skies with a high near 82 degrees, and these conditions will similarly define Saturday. However, as Sunday approaches, a noticeable shift occurs. Forecasters predict mostly cloudy skies and a drop to a high near 74, followed by an even steeper dip on Sunday night, with lows bottoming out around 49 degrees. The shift marks a stark contrast to the preceding week's warmth, signaling a return to December norms.

Monday promises some respite from the gloom with mostly sunny skies and a high near 59, following a Sunday night that's slated to be the week's coldest.