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Current conditions at
San Marcos, San Marcos Municipal Airport (KHYI)
Lat: 29.89°NLon: 97.86°WElev: 597ft.
Fair
86°F
30°C
| Humidity | 65% |
| Wind Speed | SE 15 mph |
| Barometer | 29.96 in (1013.6 mb) |
| Dewpoint | 73°F (23°C) |
| Visibility | 10.00 mi |
| Heat Index | 93°F (34°C) |
| Last update | 30 Jul 9:56 pm CDT |
Extended Forecast for
3 Miles WSW San Marcos TX
Tonight
Low: 75 °F
Partly Cloudy
Friday
High: 98 °F
Becoming
SunnyFriday Night
Low: 75 °F
Mostly Clear
Saturday
High: 97 °F
Mostly Sunny
Saturday Night
Low: 77 °F
Slight Chance
T-stormsSunday
High: 97 °F
Mostly Sunny
Sunday Night
Low: 76 °F
Mostly Clear
Monday
High: 99 °F
Hot
Monday Night
Low: 76 °F
Mostly Clear
Detailed Forecast
Tonight
Partly cloudy, with a low around 75. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Friday
Partly sunny, then gradually becoming sunny, with a high near 98. Heat index values as high as 103. South southwest wind 5 to 10 mph.
Friday Night
Mostly clear, with a low around 75. South wind 5 to 10 mph.
Saturday
Mostly sunny, with a high near 97. Heat index values as high as 106. South southwest wind around 5 mph becoming calm in the morning.
Saturday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am, then a slight chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 77. Calm wind becoming west southwest around 5 mph. Chance of precipitation is 20%.
Sunday
Mostly sunny, with a high near 97. Southwest wind around 5 mph becoming north northeast in the afternoon.
Sunday Night
Mostly clear, with a low around 76. North northeast wind around 5 mph becoming calm in the evening.
Monday
Sunny and hot, with a high near 99. Calm wind becoming south southwest around 5 mph.
Monday Night
Mostly clear, with a low around 76. South wind 5 to 10 mph.
Tuesday
Sunny, with a high near 98.
Tuesday Night
Mostly clear, with a low around 77.
Wednesday
Mostly sunny, with a high near 97.
Wednesday Night
Mostly clear, with a low around 76.
Thursday
Mostly sunny, with a high near 96.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
3 Miles WSW San Marcos TX
29.86°N 97.97°W (Elev. 646 ft)
29.86°N 97.97°W (Elev. 646 ft)
6:44 pm CDT Jul 30, 2026
10pm CDT Jul 30, 2026-6pm CDT Aug 6, 2026
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