Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

A Few Clouds

96°F

36°C

Humidity 41%
Wind Speed S 10 mph
Barometer 30.04 in (1016.5 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index101°F (38°C)
Last update 12 Jul 3:56 pm CDT
Extended Forecast for

2 Miles WSW San Marcos TX

  • This Afternoon

    This Afternoon: A 30 percent chance of showers and thunderstorms.  Mostly sunny, with a high near 93. Heat index values as high as 101. South southeast wind around 10 mph.

    High: 93 °F

    Chance
    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms before 7pm.  Partly cloudy, with a low around 76. South southeast wind 5 to 10 mph becoming light south  after midnight.

    Low: 76 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms, mainly after 4pm.  Partly sunny, with a high near 91. Calm wind becoming south around 5 mph in the afternoon.

    High: 91 °F

    Partly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: Showers and thunderstorms likely before 10pm, then a chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am.  Mostly cloudy, with a low around 74. East southeast wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 60%.

    Low: 74 °F

    Showers
    Likely

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm.  Mostly cloudy, with a high near 86. Calm wind becoming south southeast around 5 mph in the afternoon.  Chance of precipitation is 60%.

    High: 86 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 72. Southeast wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 50%.

    Low: 72 °F

    Chance
    T-storms then
    Chance
    Showers

  • Wednesday

    Wednesday: Showers likely before 10am, then showers likely and possibly a thunderstorm between 10am and 1pm, then a chance of showers and thunderstorms after 1pm.  Mostly cloudy, with a high near 86. Calm wind becoming southeast around 5 mph in the afternoon.  Chance of precipitation is 70%.

    High: 86 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms, mainly after 1am.  Mostly cloudy, with a low around 72. East wind around 5 mph becoming calm  in the evening.

    Low: 72 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 1pm.  Mostly cloudy, with a high near 87. Light east wind becoming southeast 5 to 10 mph in the morning.  Chance of precipitation is 30%.

    High: 87 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93. Heat index values as high as 101. South southeast wind around 10 mph.
Tonight
A 30 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 76. South southeast wind 5 to 10 mph becoming light south after midnight.
Monday
A 40 percent chance of showers and thunderstorms, mainly after 4pm. Partly sunny, with a high near 91. Calm wind becoming south around 5 mph in the afternoon.
Monday Night
Showers and thunderstorms likely before 10pm, then a chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 74. East southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%.
Tuesday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 86. Calm wind becoming south southeast around 5 mph in the afternoon. Chance of precipitation is 60%.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 50%.
Wednesday
Showers likely before 10am, then showers likely and possibly a thunderstorm between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 86. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 70%.
Wednesday Night
A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 72. East wind around 5 mph becoming calm in the evening.
Thursday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 87. Light east wind becoming southeast 5 to 10 mph in the morning. Chance of precipitation is 30%.
Thursday Night
Mostly cloudy, with a low around 73.
Friday
Partly sunny, with a high near 90.
Friday Night
Partly cloudy, with a low around 74.
Saturday
Mostly sunny, with a high near 91.
Saturday Night
Partly cloudy, with a low around 74.
Sunday
Mostly sunny, with a high near 93.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WSW San Marcos TX
 29.86°N 97.97°W (Elev. 646 ft)
2:46 pm CDT Jul 12, 2026
4pm CDT Jul 12, 2026-6pm CDT Jul 19, 2026
 
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Additional Resources

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