Bundle Up for the MLK March: Chilly Morning Frost to Give Way to Golden Afternoon Sun

Morning: A Frosty Start for Local Commemorations

San Antonio residents waking up early for the Martin Luther King Jr. Day celebrations this Monday, January 19, 2026, will face a crisp and chilly start to the day. Following a cold front that brought the first freeze of the winter to the region over the weekend, temperatures early this morning are lingering near the freezing mark. Between 4:00 a.m. and 8:00 a.m., thermometers across Bexar County are expected to hover between 33°F and 35°F. While a light freeze is possible in some low-lying areas, skies remain mostly clear, offering a bright but biting start to the holiday.

For those attending the 39th Annual MLK March, which begins its lineup at 7:30 a.m., heavy layers are highly recommended. Fortunately, the biting cold will not last long. By the time the march officially kicks off at 10:00 a.m., the mercury is predicted to rise significantly, reaching approximately 50°F. Light winds from the southeast at 5 to 10 mph will keep the wind chill manageable as the community gathers to honor Dr. King’s legacy.

Afternoon: Ideal Conditions for Outdoor Gatherings

As the march concludes and afternoon celebrations begin at Pittman-Sullivan Park, San Antonio will enjoy some of the most pleasant weather of the month. Under mostly sunny skies, the temperature will climb steadily through the midday hours. By noon, residents can expect temperatures around 60°F, eventually reaching a daily high of 67°F between 3:00 p.m. and 4:00 p.m. These conditions are perfect for those spending the day outdoors, though the transition from the freezing morning to the mild afternoon makes dressing in removable layers the best strategy for the day.

Evening: Increasing Clouds and Overnight Outlook

As the sun sets on this Monday evening, the clear skies will begin to give way to increasing cloud cover. While the evening will remain dry for the majority of the city, a secondary cold front is expected to stall just north of the region late tonight. This will result in a 10% chance of light rain or drizzle after midnight, with temperatures dipping to a more moderate low of 49°F to 51°F—significantly warmer than the previous night’s freeze.

Weather Notices and Warnings

• Freeze Advisory: While no formal winter storm warnings are in effect today, a light freeze was noted in parts of Bexar County early this morning. Residents are encouraged to ensure outdoor pets have adequate shelter and to check on sensitive plants.
• Wind/Rain: No significant wind or rain warnings are active for today. Southeast winds remain light at 5-10 mph, and precipitation chances remain below 10% until late tonight.
• Looking Ahead: Cloud cover will thicken on Tuesday, with higher rain chances expected by Wednesday as Pacific moisture interacts with the stalled front.