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.

Fair

83°F

28°C

Humidity 72%
Wind Speed S 14 mph
Barometer 29.73 in (1006.0 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index89°F (32°C)
Last update 26 Apr 6:56 pm CDT
Extended Forecast for

5 Miles SSE Wimberley TX

  • Tonight

    Tonight: Mostly cloudy, with a low around 71. South southeast wind around 10 mph, with gusts as high as 20 mph.

    Low: 71 °F

    Mostly Cloudy

  • Monday

    Monday: Patchy fog between 8am and 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 90. South wind around 10 mph.

    High: 90 °F

    Patchy Fog
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 71. South southeast wind around 10 mph.

    Low: 71 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 93. Heat index values as high as 101. South wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 93 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 69. South wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 69 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 91. South wind 5 to 10 mph becoming northeast in the afternoon.

    High: 91 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Northeast wind around 10 mph, with gusts as high as 20 mph.

    Low: 65 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly cloudy, with a high near 82. East wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 82 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65. East wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 65 °F

    Chance
    T-storms

Detailed Forecast

Tonight
Mostly cloudy, with a low around 71. South southeast wind around 10 mph, with gusts as high as 20 mph.
Monday
Patchy fog between 8am and 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 90. South wind around 10 mph.
Monday Night
Increasing clouds, with a low around 71. South southeast wind around 10 mph.
Tuesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 93. Heat index values as high as 101. South wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 69. South wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 91. South wind 5 to 10 mph becoming northeast in the afternoon.
Wednesday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Northeast wind around 10 mph, with gusts as high as 20 mph.
Thursday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly cloudy, with a high near 82. East wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65. East wind 10 to 15 mph, with gusts as high as 25 mph.
Friday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 76. Chance of precipitation is 60%.
Friday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 56.
Saturday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 70.
Saturday Night
Mostly cloudy, with a low around 53.
Sunday
Mostly sunny, with a high near 74.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSE Wimberley TX
 29.92°N 98.07°W (Elev. 1047 ft)
Last Update:
6:44 pm CDT Apr 26, 2026
Forecast Valid:
7pm CDT Apr 26, 2026-6pm CDT May 3, 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