Current conditions at
San Marcos, San Marcos Municipal Airport (KHYI)
Lat: 29.89°NLon: 97.86°WElev: 597ft.
Overcast
78°F
26°C
| Humidity | 69% |
| Wind Speed | W 6 mph |
| Barometer | 29.97 in (1014.2 mb) |
| Dewpoint | 67°F (19°C) |
| Visibility | 10.00 mi |
| Heat Index | 80°F (27°C) |
| Last update | 7 Mar 12:56 pm CST |
Extended Forecast for
San Marcos TX
This Afternoon

High: 76 °F
T-storms
Tonight

Low: 54 °F
Chance
T-stormsSunday

High: 71 °F
Chance
T-stormsSunday Night
Low: 60 °F
Slight Chance
T-storms then
CloudyMonday

High: 82 °F
Chance
ShowersMonday Night
Low: 66 °F
Mostly Cloudy
then Slight
Chance
ShowersTuesday

High: 83 °F
Chance
ShowersTuesday Night

Low: 61 °F
Showers
LikelyWednesday

High: 84 °F
Chance
Showers
Detailed Forecast
This Afternoon
Showers and possibly a thunderstorm before 3pm, then showers and thunderstorms likely after 3pm. High near 76. West wind around 15 mph becoming north. Winds could gust as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 54. North wind 10 to 15 mph, with gusts as high as 25 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
A 40 percent chance of showers and thunderstorms, mainly after 3pm. Mostly cloudy, with a high near 71. North wind 5 to 10 mph.
Sunday Night
A 20 percent chance of showers and thunderstorms before midnight. Cloudy, with a low around 60. Northeast wind around 5 mph becoming calm.
Monday
A slight chance of showers, then a chance of showers and thunderstorms after noon. Cloudy, with a high near 82. Light southeast wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 30%.
Monday Night
A 20 percent chance of showers after midnight. Cloudy, with a low around 66. South southeast wind around 10 mph.
Tuesday
A chance of showers before noon, then a chance of showers and thunderstorms between noon and 3pm, then a chance of showers after 3pm. Cloudy, with a high near 83. South wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 40%.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 61. South southeast wind 15 to 20 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 70%.
Wednesday
A 40 percent chance of showers, mainly before noon. Sunny, with a high near 84. Southwest wind 5 to 15 mph becoming north northwest in the afternoon. Winds could gust as high as 25 mph.
Wednesday Night
A 20 percent chance of showers before midnight. Mostly clear, with a low around 51.
Thursday
Sunny, with a high near 71.
Thursday Night
Clear, with a low around 47.
Friday
Sunny, with a high near 79.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
San Marcos TX
29.88°N 97.91°W (Elev. 597 ft)
29.88°N 97.91°W (Elev. 597 ft)
1:10 pm CST Mar 7, 2026
1pm CST Mar 7, 2026-6pm CDT Mar 13, 2026


