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City of San Marcos, TexasSan Marcos, TX 7-Day Night Weather Forecast
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San Marcos, TX Weather Forecast
San Marcos, TX Weather Forecast Date: 151 PM CDT Mon Sep 21 2026
The area/counties/county of: Hays, including the city of San Marcos.or toggle through each period.
This Afternoon... Partly cloudy with a chance of showers and thunderstorms. Near steady temperature in the mid 90s. East winds around 5 mph. Chance of rain 40%.
Tonight... Mostly clear. A slight chance of showers and thunderstorms in the evening. Lows in the lower 70s. Southeast winds around 5 mph, becoming south after midnight. Chance of rain 20%.
Tuesday... Mostly sunny in the morning, then partly cloudy with a slight chance of showers and thunderstorms in the afternoon. Highs in the upper 90s. Northeast winds around 5 mph.
Tuesday Night... Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly clear after midnight. Lows in the lower 70s. Northeast winds around 5 mph in the evening, becoming light and variable.
Wednesday... Partly cloudy. Highs in the upper 90s. East winds 5 to 10 mph. Highest heat index readings up to 105.
Wednesday Night... Partly cloudy. Lows in the lower 70s. Highs in the mid 90s.
Thursday... Partly cloudy. Lows in the lower 70s. Highs in the mid 90s.
Friday... Partly cloudy. Lows in the lower 70s. Highs in the mid 90s.
Saturday... Partly cloudy. Lows in the lower 70s. Highs in the mid 90s.
POP = Probability of Precipitation
San Marcos Radar Loop
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