National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Overcast

73°F

23°C

Humidity 81%
Wind Speed S 10 mph
Barometer 29.99 in (1015.0 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 1 Apr 8:56 am CDT
Extended Forecast for

5 Miles SSE Niederwald TX

  • Today

    Today: Partly sunny, with a high near 91. South wind 10 to 20 mph, with gusts as high as 30 mph.

    High: 91 °F

    Partly Sunny

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 68. South southeast wind 15 to 20 mph, with gusts as high as 30 mph.

    Low: 68 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms, mainly between 7am and 1pm. Mostly cloudy, with a high near 85. South southeast wind 5 to 15 mph, with gusts as high as 25 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 85 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 69. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 69 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 89. South southeast wind 10 to 20 mph, with gusts as high as 30 mph.

    High: 89 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 68. South southeast wind 10 to 20 mph, with gusts as high as 30 mph.

    Low: 68 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Saturday

    Saturday: Showers and possibly a thunderstorm. High near 78. South wind 10 to 15 mph becoming north northwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 80%.

    High: 78 °F

    Showers

  • Saturday Night

    Saturday Night: A 50 percent chance of showers and thunderstorms. Cloudy, with a low around 52. North northeast wind around 15 mph, with gusts as high as 25 mph.

    Low: 52 °F

    Chance
    T-storms

  • Sunday

    Sunday: A chance of showers and thunderstorms before 1pm, then a slight chance of showers. Cloudy, with a high near 65. North northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.

    High: 65 °F

    Chance
    Showers

Detailed Forecast

Today
Partly sunny, with a high near 91. South wind 10 to 20 mph, with gusts as high as 30 mph.
Tonight
A 20 percent chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 68. South southeast wind 15 to 20 mph, with gusts as high as 30 mph.
Thursday
A 50 percent chance of showers and thunderstorms, mainly between 7am and 1pm. Mostly cloudy, with a high near 85. South southeast wind 5 to 15 mph, with gusts as high as 25 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Mostly cloudy, with a low around 69. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.
Friday
Mostly cloudy, with a high near 89. South southeast wind 10 to 20 mph, with gusts as high as 30 mph.
Friday Night
A 30 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 68. South southeast wind 10 to 20 mph, with gusts as high as 30 mph.
Saturday
Showers and possibly a thunderstorm. High near 78. South wind 10 to 15 mph becoming north northwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 80%.
Saturday Night
A 50 percent chance of showers and thunderstorms. Cloudy, with a low around 52. North northeast wind around 15 mph, with gusts as high as 25 mph.
Sunday
A chance of showers and thunderstorms before 1pm, then a slight chance of showers. Cloudy, with a high near 65. North northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
Sunday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 49.
Monday
Partly sunny, with a high near 68.
Monday Night
Mostly cloudy, with a low around 49.
Tuesday
Mostly cloudy, with a high near 73.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSE Niederwald TX
 29.93°N 97.7°W (Elev. 449 ft)
Last Update:
6:46 am CDT Apr 1, 2026
Forecast Valid:
9am CDT Apr 1, 2026-6pm CDT Apr 7, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation