Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

78°F

26°C

Humidity 79%
Wind Speed S 3 mph
Barometer 30.01 in (1015.3 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 28 Aug 2:56 am CDT
Extended Forecast for

3 Miles ESE Wimberley TX

  • Overnight

    Overnight: Partly cloudy, with a low around 75. Calm wind.

    Low: 75 °F

    Partly Cloudy

  • Friday

    Friday: A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm.  Mostly sunny, with a high near 97. Heat index values as high as 106. Calm wind becoming east southeast around 5 mph in the afternoon.  Chance of precipitation is 20%.

    High: 97 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: A slight chance of thunderstorms before 7pm.  Mostly clear, with a low around 74. East southeast wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 10%.

    Low: 74 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 97. Heat index values as high as 104. Calm wind becoming south southeast around 5 mph in the afternoon.

    High: 97 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 73. Southeast wind around 5 mph becoming south southwest after midnight.

    Low: 73 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 97. Calm wind becoming south around 5 mph in the morning.

    High: 97 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 74. Southeast wind 5 to 10 mph.

    Low: 74 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 97. South southeast wind around 5 mph.

    High: 97 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 74. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 74 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 75. Calm wind.
Friday
A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 97. Heat index values as high as 106. Calm wind becoming east southeast around 5 mph in the afternoon. Chance of precipitation is 20%.
Friday Night
A slight chance of thunderstorms before 7pm. Mostly clear, with a low around 74. East southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 10%.
Saturday
Sunny, with a high near 97. Heat index values as high as 104. Calm wind becoming south southeast around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 73. Southeast wind around 5 mph becoming south southwest after midnight.
Sunday
Sunny, with a high near 97. Calm wind becoming south around 5 mph in the morning.
Sunday Night
Mostly clear, with a low around 74. Southeast wind 5 to 10 mph.
Monday
Sunny, with a high near 97. South southeast wind around 5 mph.
Monday Night
Mostly clear, with a low around 74. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday
Mostly sunny, with a high near 97.
Tuesday Night
Mostly clear, with a low around 74.
Wednesday
Sunny, with a high near 97.
Wednesday Night
Mostly clear, with a low around 74.
Thursday
Mostly sunny, with a high near 98.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ESE Wimberley TX
 29.97°N 98.05°W (Elev. 1050 ft)
2:42 am CDT Aug 28, 2026
3am CDT Aug 28, 2026-6pm CDT Sep 3, 2026
 
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Additional Resources

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