Thick Fog and Toasty Temps: An Unseasonably Warm Thursday for the Alamo City
Spring Fever Arrives Early in San Antonio
San Antonio continues to experience a remarkably warm stretch this February, and today, Thursday, February 19, 2026, is no exception. Local meteorologists have noted that this month has seen the third-warmest start in the city's recorded history, with high temperatures trending nearly a month ahead of schedule. As residents step out today, they will find a blend of atmospheric challenges, starting with a thick morning shroud followed by afternoon heat that feels more like mid-May than late winter.
Morning Commute: Dense Fog Advisory
The day begins on a muggy and cautious note. Between 4:00 a.m. and 9:00 a.m., a dense fog is expected to settle over the San Antonio metro area. Visibility on major thoroughfares could drop to under a quarter-mile at times, creating hazardous driving conditions for the morning rush hour. Drivers are urged to use low-beam headlights, reduce speed, and maintain extra following distance. Temperatures during the morning hours will hover in the lower 60s, specifically around 62°F to 64°F, under heavy, humid cloud cover.
Afternoon: Rapid Warmup and Sunny Skies
Once the morning fog lifts, the atmosphere will undergo a rapid transformation. As the sun breaks through by mid-morning, temperatures are expected to climb quickly. By noon, the mercury should reach the mid-70s, peaking in the afternoon at a high of 84°F to 85°F. This is approximately 15 degrees above the historical average for this time of year. While the heat will be significant, a gentle northeast wind between 5 and 10 mph will provide a slight breeze. Despite the warmth, there remains a minor 10% to 20% chance of a stray rain shower during the peak heating hours, though most of the city is expected to remain dry.
Evening Outlook and Overnight Conditions
The warmth will linger well after the sun goes down. Temperatures are not expected to fall below the 70-degree mark until approximately 9:00 p.m., making for a very mild evening for outdoor dining or activities. Overnight, the sky will transition from partly cloudy to mostly cloudy, with a low temperature settling near 61°F. Another round of patchy fog is possible after 3:00 a.m. on Friday morning. While today remains unseasonably hot, residents should keep their jackets handy for later in the week, as a cold front is currently forecasted to arrive by Saturday.
- Morning Low: 62°F to 64°F
- Afternoon High: 84°F to 85°F
- Wind: NE at 5-10 mph
- Humidity: High in the morning, decreasing by afternoon