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Hazardous Weather Conditions
Current conditions at
San Marcos, San Marcos Municipal Airport (KHYI)
Lat: 29.89°NLon: 97.86°WElev: 597ft.
Fair
89°F
32°C
| Humidity | 52% |
| Wind Speed | S 10 mph |
| Barometer | 29.96 in (1013.7 mb) |
| Dewpoint | 69°F (21°C) |
| Visibility | 10.00 mi |
| Heat Index | 94°F (34°C) |
| Last update | 26 Aug 10:56 pm CDT |
Extended Forecast for
4 Miles SSW San Marcos TX
Heat Advisory August 26, 11:20pm until August 27, 07:00pm
NOW until 7:00pm Thu
Heat Advisory
Tonight
Low: 79 °F
Mostly Clear
Thursday
High: 101 °F
Sunny then
Chance
T-stormsThursday Night
Low: 77 °F
Chance
T-stormsFriday
High: 97 °F
Sunny then
Slight Chance
T-stormsFriday Night
Low: 76 °F
Partly Cloudy
Saturday
High: 97 °F
Sunny
Saturday Night
Low: 75 °F
Mostly Clear
Sunday
High: 96 °F
Sunny
Detailed Forecast
Tonight
Mostly clear, with a low around 79. South southwest wind around 5 mph.
Thursday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 101. Heat index values as high as 109. West southwest wind around 5 mph becoming calm in the morning.
Thursday Night
A 30 percent chance of showers and thunderstorms, mainly before 10pm. Partly cloudy, with a low around 77. South southwest wind around 5 mph becoming calm in the evening.
Friday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 97. Heat index values as high as 106. Calm wind becoming east southeast around 5 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 76. East southeast wind around 5 mph becoming calm after midnight.
Saturday
Sunny, with a high near 97. Calm wind becoming southeast around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 75. East southeast wind 5 to 10 mph becoming south after midnight.
Sunday
Sunny, with a high near 96. Calm wind becoming south southeast around 5 mph in the morning.
Sunday Night
Mostly clear, with a low around 75. Southeast wind 5 to 10 mph.
Monday
Mostly sunny, with a high near 96.
Monday Night
Mostly clear, with a low around 75.
Tuesday
Mostly sunny, with a high near 97.
Tuesday Night
Mostly clear, with a low around 75.
Wednesday
Mostly sunny, with a high near 97.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
4 Miles SSW San Marcos TX
29.83°N 97.94°W (Elev. 610 ft)
29.83°N 97.94°W (Elev. 610 ft)
8:44 pm CDT Aug 26, 2026
11pm CDT Aug 26, 2026-6pm CDT Sep 2, 2026
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