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

78°F

26°C

Humidity 90%
Wind Speed S 7 mph
Barometer 29.90 in (1011.4 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 29 Jul 3:56 am CDT
Extended Forecast for

2 Miles SSW Hays TX

  • Today

    Today: Mostly cloudy through mid morning, then gradual clearing, with a high near 97. Heat index values as high as 105. South wind 5 to 10 mph.

    High: 97 °F

    Becoming
    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 75. South wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 75 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Partly sunny, then gradually becoming sunny, with a high near 98. Heat index values as high as 105. South wind 5 to 10 mph.

    High: 98 °F

    Becoming
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 75. South wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 75 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 99. South southwest wind around 5 mph.

    High: 99 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 77. South wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 77 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny and hot, with a high near 100. Southwest wind around 5 mph.

    High: 100 °F

    Hot

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 77. East southeast wind around 5 mph becoming west southwest after midnight.

    Low: 77 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny and hot, with a high near 99. West wind around 5 mph becoming north northeast in the afternoon.

    High: 99 °F

    Hot

Detailed Forecast

Today
Mostly cloudy through mid morning, then gradual clearing, with a high near 97. Heat index values as high as 105. South wind 5 to 10 mph.
Tonight
Increasing clouds, with a low around 75. South wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday
Partly sunny, then gradually becoming sunny, with a high near 98. Heat index values as high as 105. South wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 75. South wind 5 to 10 mph, with gusts as high as 20 mph.
Friday
Sunny and hot, with a high near 99. South southwest wind around 5 mph.
Friday Night
Mostly clear, with a low around 77. South wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday
Mostly sunny and hot, with a high near 100. Southwest wind around 5 mph.
Saturday Night
Partly cloudy, with a low around 77. East southeast wind around 5 mph becoming west southwest after midnight.
Sunday
Mostly sunny and hot, with a high near 99. West wind around 5 mph becoming north northeast in the afternoon.
Sunday Night
Mostly clear, with a low around 76.
Monday
Sunny and hot, with a high near 100.
Monday Night
Mostly clear, with a low around 76.
Tuesday
Sunny, with a high near 98.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSW Hays TX
 30.09°N 97.89°W (Elev. 801 ft)
Last Update:
2:44 am CDT Jul 29, 2026
Forecast Valid:
4am CDT Jul 29, 2026-6pm CDT Aug 4, 2026
 
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