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San Marcos Weather Forecast
| THIS AFTERNOON | TONIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | MONDAY | TUESDAY | TUESDAY NIGHT | WEDNESDAY |
 |  |  | | | | | |  |  | |
| Mostly Cloudy | Partly Cloudy | Clearing | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Partly Cloudy | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm |
| Hi: 95°FHi: 35°C | Lo: 71°FLo: 22°C | Hi: 95°FHi: 35°C | Lo: 71°FLo: 22°C | Hi: 95°FHi: 35°C | Hi: 95°FHi: 35°C Lo: 71°FLo: 22°C | Hi: 95°FHi: 35°C Lo: 71°FLo: 22°C | Hi: 95°FHi: 35°C Lo: 71°FLo: 22°C | Hi: 95°FHi: 35°C | Lo: 71°FLo: 22°C | Hi: 91°FHi: 33°C |
| POP: 30% | POP: 40% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 132 PM CDT Thu Sep 24 2026 
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Issued: 131 PM CDT Thu Sep 24 2026
Key Messages
Updated at 129 PM CDT Thu Sep 24 2026- Drier with summer-like temepratures through the weekend.
- A Pacific cold front may bring widespread rain next week.
Aviation
... (18Z TAFS) Issued at 1218 PM CDT Thu Sep 24 2026
VFR conditions are expected for the rest of the day. Shower coverage is expected to be less than yesterday with about a 10-15 percent chance for any activity to approach terminals; therefore, have not included any precipitation mention in the forecast. MVFR ceilings are expec...