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Current conditions at
San Marcos, San Marcos Municipal Airport (KHYI)
Lat: 29.89°NLon: 97.86°WElev: 597ft.
Fair
82°F
28°C
| Humidity | 79% |
| Wind Speed | S 10 mph |
| Barometer | 29.95 in (1013.3 mb) |
| Dewpoint | 75°F (24°C) |
| Visibility | 10.00 mi |
| Heat Index | 89°F (32°C) |
| Last update | 3 Sep 12:56 am CDT |
Extended Forecast for
5 Miles WSW Martindale TX
Overnight
Low: 77 °F
Partly Cloudy
Thursday
High: 100 °F
Hot
Thursday Night
Low: 77 °F
Mostly Clear
then Slight
Chance
T-stormsFriday
High: 97 °F
Slight Chance
Showers then
Slight Chance
T-stormsFriday Night
Low: 76 °F
Mostly Clear
Saturday
High: 97 °F
Mostly Sunny
Saturday Night
Low: 76 °F
Mostly Clear
Sunday
High: 97 °F
Sunny
Sunday Night
Low: 76 °F
Mostly Clear
Detailed Forecast
Overnight
Partly cloudy, with a low around 77. South wind around 10 mph.
Thursday
Sunny and hot, with a high near 100. Heat index values as high as 107. South southwest wind 5 to 10 mph.
Thursday Night
A 20 percent chance of showers and thunderstorms after 1am. Increasing clouds, with a low around 77. Southeast wind 5 to 15 mph, with gusts as high as 20 mph.
Friday
A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 97. Heat index values as high as 104. South wind around 5 mph. Chance of precipitation is 20%.
Friday Night
Mostly clear, with a low around 76. Southeast wind 5 to 10 mph becoming light south after midnight.
Saturday
Mostly sunny, with a high near 97. Calm wind becoming south around 5 mph.
Saturday Night
Mostly clear, with a low around 76. East southeast wind 5 to 10 mph becoming light and variable after midnight.
Sunday
Sunny, with a high near 97. Calm wind becoming east southeast around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 76. East southeast wind around 5 mph becoming calm after midnight.
Labor Day
Sunny, with a high near 97.
Monday Night
Mostly clear, with a low around 75.
Tuesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 96.
Tuesday Night
Partly cloudy, with a low around 75.
Wednesday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 96.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
5 Miles WSW Martindale TX
29.81°N 97.91°W (Elev. 581 ft)
29.81°N 97.91°W (Elev. 581 ft)
12:42 am CDT Sep 3, 2026
1am CDT Sep 3, 2026-6pm CDT Sep 9, 2026
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