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

81°F

27°C

Humidity 85%
Wind Speed S 13 mph
Barometer 29.98 in (1014.2 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 14 Oct 12:56 am CDT
Extended Forecast for

3 Miles ESE Niederwald TX

  • Overnight

    Overnight: Mostly cloudy, with a low around 77. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 77 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 92. Heat index values as high as 102. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.

    High: 92 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 68. South southeast wind 5 to 15 mph, with gusts as high as 30 mph.

    Low: 68 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 90. Southeast wind around 5 mph.

    High: 90 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 64. East southeast wind around 5 mph becoming calm in the evening.

    Low: 64 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Friday

    Friday: Partly sunny, with a high near 77. Windy, with a north wind 20 to 30 mph, with gusts as high as 40 mph.

    High: 77 °F

    Partly Sunny
    and Windy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 53. Breezy, with a north wind 20 to 25 mph, with gusts as high as 40 mph.

    Low: 53 °F

    Partly Cloudy
    and Breezy
    then Partly
    Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 72. North northeast wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 72 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 51. North northeast wind 5 to 10 mph becoming light north.

    Low: 51 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 77. South wind around 10 mph, with gusts as high as 20 mph.
Wednesday
A slight chance of showers between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 92. Heat index values as high as 102. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
Wednesday Night
Partly cloudy, with a low around 68. South southeast wind 5 to 15 mph, with gusts as high as 30 mph.
Thursday
Mostly sunny, with a high near 90. Southeast wind around 5 mph.
Thursday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 64. East southeast wind around 5 mph becoming calm in the evening.
Friday
Partly sunny, with a high near 77. Windy, with a north wind 20 to 30 mph, with gusts as high as 40 mph.
Friday Night
Partly cloudy, with a low around 53. Breezy, with a north wind 20 to 25 mph, with gusts as high as 40 mph.
Saturday
Mostly sunny, with a high near 72. North northeast wind 15 to 20 mph, with gusts as high as 30 mph.
Saturday Night
Partly cloudy, with a low around 51. North northeast wind 5 to 10 mph becoming light north.
Sunday
Sunny, with a high near 77.
Sunday Night
Partly cloudy, with a low around 55.
Monday
Mostly sunny, with a high near 83.
Monday Night
Partly cloudy, with a low around 61.
Tuesday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ESE Niederwald TX
 29.98°N 97.71°W (Elev. 489 ft)
Last Update:
1:30 am CDT Oct 14, 2026
Forecast Valid:
1am CDT Oct 14, 2026-6pm CDT Oct 20, 2026
 
Forecast Discussion
 
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Additional Resources

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