| NWS Forecast for: San Marcos Municipal Airport TX Issued by: National Weather Service Austin/San Antonio, TX Last Update: 8:50 pm CDT Jun 30, 2025 |  |
| Tonight: Widespread haze after 4am. Mostly cloudy, with a low around 72. South southwest wind 5 to 10 mph becoming light after midnight. Tuesday: Widespread haze. Mostly sunny, with a high near 94. Heat index values as high as 100. Light and variable wind becoming south southeast 5 to 10 mph in the afternoon. Tuesday Night: Mostly cloudy, with a low around 74. South wind 5 to 10 mph becoming light south southwest after midnight. Wednesday: Mostly cloudy, with a high near 94. Heat index values as high as 100. Light south wind becoming south southeast 5 to 10 mph in the afternoon. Wednesday Night: Mostly cloudy, with a low around 75. South wind 5 to 10 mph. Thursday: Mostly cloudy, with a high near 93. Light south wind becoming south southeast 5 to 10 mph in the morning. Winds could gust as high as 20 mph. Thursday Night: Mostly cloudy, with a low around 76. South southeast wind 5 to 15 mph, with gusts as high as 20 mph. Independence Day: Partly sunny, with a high near 96. South wind 5 to 10 mph, with gusts as high as 20 mph. Friday Night: Partly cloudy, with a low around 75. South wind 5 to 15 mph, with gusts as high as 20 mph. Saturday: Mostly sunny, with a high near 97. Saturday Night: Partly cloudy, with a low around 74. Sunday: Mostly sunny and hot, with a high near 99. Sunday Night: Partly cloudy, with a low around 73. Monday: Mostly sunny, with a high near 98. | |
| San Marcos Municipal Airport TX 29.88°N 97.86°W (Elev. 600 ft) | |
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