Texas – Fog hangs low over roadways before sunrise, softening streetlights and shrinking visibility across San Antonio. The warm, humid air feels more like spring, but winter patterns are already lining up behind it.
Early travel faces patchy fog, especially near low-lying roads and along Loop 410 and I-35. Conditions improve by midmorning as clouds thin and temperatures rise quickly. Afternoon warmth pushes into the lower 80s, keeping roads dry and travel smooth through daylight hours.
Saturday stays unusually warm for late December. Clouds gradually break, and sunshine helps temperatures climb near 80 degrees again. Winds stay light, and outdoor plans remain in good shape across Bexar County and surrounding communities.
Changes begin late Sunday. Clouds thicken, and a slight chance of showers develops by evening. Isolated thunderstorms remain possible overnight, especially west and south of the city. Roads could turn slick at times, though widespread flooding is not expected.
Behind the rain, cooler air slides in. Monday turns noticeably different. North winds increase, with gusts approaching 30 mph at times. Temperatures fall into the lower 50s during the day, making it feel sharply cooler compared to the weekend warmth. Drivers should expect crosswinds on east-west routes like Highway 90.
According to the National Weather Service, the cooler pattern settles in through midweek. Nights dip into the 40s, and mornings feel crisp for late December in South Texas. While no freeze is expected locally, the warm-to-cool transition could catch travelers off guard.
Looking toward New Year’s Eve on Wednesday, conditions appear dry with mild daytime temperatures returning near the upper 60s. Evening celebrations should stay weather-friendly, though cooler air lingers after sunset.
Slow down in fog this morning. Plan extra time Sunday night if traveling. How did the temperature swing feel where you are?
Five-Day Outlook for San Antonio, TX
Today: Morning fog, then partly sunny. High near 82°.
Saturday: Becoming mostly sunny. High near 80°.
Sunday: Mostly cloudy. Slight chance of showers late. High near 81°.
Monday: Breezy and cooler. High near 53°.
Tuesday: Mostly cloudy and mild. High near 55°.
