San Antonio started Monday, March 9, 2026, shrouded in thick morning fog, with visibility in some spots shrinking to just a few tenths of a mile and temperatures hovering near 63°F. The fog is patchy rather than blanket coverage, but where it settles, it can slow the commute and complicate those first flights out. Forecasters expect the gray soup to thin by mid to late morning, setting up a warm and muggy afternoon.
Dense Fog Advisory And Commute Tips
A Dense Fog Advisory for much of south-central Texas is in effect until 10 AM CDT Monday, March 9, 2026. The advisory urges drivers to slow down, stick with low-beam headlights, and leave extra room between vehicles, since visibility can drop to a quarter mile or less in the worst pockets. Patchy drizzle or light mist may linger before the fog lifts, so plan a little extra time on I-35 and other low-lying routes early today. These details and timing come from the National Weather Service Austin/San Antonio.
Afternoon Warmth And Tuesday Storm Risk
Once the fog breaks, expect a warm, mostly cloudy afternoon with highs near 82°F. South-southeast winds will start out light, then pick up to around 10 mph later in the day. Monday night stays mild and muggy, with a low near 69°F and a continued southeasterly breeze.
Tuesday, March 10, begins with only a slight chance of daytime showers. The bigger story arrives from Tuesday night into Wednesday, March 11, when a more organized band of storms is expected to develop. That setup could bring periods of heavy rain and gusty winds, so anyone with late-Tuesday or pre-dawn Wednesday plans should keep an eye on updates and be ready for changing conditions.
Storms Return Tuesday Night
Late Tuesday through early Wednesday, forecasters expect an organized line of showers and thunderstorms to sweep through the area. The strongest storms could drop heavy downpours and produce damaging wind gusts. Event organizers and early risers with Wednesday commitments would be wise to have a backup plan and check the latest forecasts.
For context on how this unsettled pattern has been building, revisit our March 7 regional outlook in from sticky sunrise to hail threat.
Quick Forecast
Here is the quick rundown: Monday tops out near 82°F with morning fog and patchy drizzle, then a warm and humid afternoon. Monday night dips to around 69°F. Tuesday climbs into the mid-80s with only a slight chance of daytime storms, followed by a higher risk of organized showers and thunderstorms Tuesday night into Wednesday. Stronger cells could bring wind gusts around 25 to 30 mph, and wet roads may linger into Wednesday morning, so travel plans may need a little extra cushion.
