| NWS Forecast for: San Marcos TX Issued by: National Weather Service Austin/San Antonio, TX Last Update: 6:44 am CDT May 18, 2025 | |
| Today: Mostly cloudy, with a high near 95. Heat index values as high as 101. South wind around 15 mph, with gusts as high as 25 mph. Tonight: Mostly cloudy, with a low around 74. South wind 10 to 15 mph, with gusts as high as 25 mph. Monday: A 20 percent chance of showers and thunderstorms after 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 97. Heat index values as high as 106. South wind 10 to 15 mph, with gusts as high as 30 mph. Monday Night: Isolated showers and thunderstorms before 1am. Partly cloudy, with a low around 73. South wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%. Tuesday: Mostly sunny, with a high near 96. South wind around 5 mph becoming north in the afternoon. Tuesday Night: Partly cloudy, with a low around 69. Northeast wind around 5 mph. Wednesday: Partly sunny, with a high near 95. East wind 5 to 10 mph. Wednesday Night: Mostly cloudy, with a low around 69. East wind 5 to 10 mph becoming south southeast after midnight. Thursday: Isolated showers and thunderstorms after 1pm. Mostly sunny, with a high near 92. East southeast wind 5 to 10 mph. Chance of precipitation is 20%. Thursday Night: Partly cloudy, with a low around 67. Friday: Mostly sunny, with a high near 94. Friday Night: Partly cloudy, with a low around 70. Saturday: Mostly sunny, with a high near 96. | |
| San Marcos TX 29.88°N 97.94°W (Elev. 577 ft) | |
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