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

72°F

22°C

Humidity 91%
Wind Speed SE 3 mph
Barometer 29.96 in (1013.7 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 21 Sep 5:56 am CDT
Extended Forecast for

Martindale TX

  • Today

    Today: Mostly sunny, with a high near 95. Light south wind increasing to 5 to 10 mph in the morning.

    High: 95 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 72. South southeast wind 5 to 10 mph.

    Low: 72 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 97. Heat index values as high as 102. South wind 5 to 10 mph.

    High: 97 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 73. South southeast wind 5 to 10 mph.

    Low: 73 °F

    Mostly Clear

  • Tuesday

    Tuesday: 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 98. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 98 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms, then a chance of showers after 7pm. Mostly clear, with a low around 74. South southeast wind 5 to 10 mph. Chance of precipitation is 30%.

    Low: 74 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 95. South southwest wind 5 to 10 mph becoming north in the afternoon. Chance of precipitation is 60%.

    High: 95 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70. Northeast wind around 5 mph.

    Low: 70 °F

    Chance
    T-storms

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89. North wind 5 to 10 mph.

    High: 89 °F

    Chance
    T-storms

Detailed Forecast

Today
Mostly sunny, with a high near 95. Light south wind increasing to 5 to 10 mph in the morning.
Tonight
Mostly clear, with a low around 72. South southeast wind 5 to 10 mph.
Monday
Mostly sunny, with a high near 97. Heat index values as high as 102. South wind 5 to 10 mph.
Monday Night
Mostly clear, with a low around 73. South southeast wind 5 to 10 mph.
Tuesday
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 98. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Tuesday Night
A slight chance of showers and thunderstorms, then a chance of showers after 7pm. Mostly clear, with a low around 74. South southeast wind 5 to 10 mph. Chance of precipitation is 30%.
Wednesday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 95. South southwest wind 5 to 10 mph becoming north in the afternoon. Chance of precipitation is 60%.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70. Northeast wind around 5 mph.
Thursday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89. North wind 5 to 10 mph.
Thursday Night
A 20 percent chance of showers before 1am. Mostly clear, with a low around 65.
Friday
A 20 percent chance of showers. Sunny, with a high near 91.
Friday Night
Mostly clear, with a low around 64.
Saturday
A 20 percent chance of showers. Sunny, with a high near 91.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Martindale TX
 29.84°N 97.83°W (Elev. 502 ft)
Last Update:
6:02 am CDT Sep 21, 2025
Forecast Valid:
6am CDT Sep 21, 2025-6pm CDT Sep 27, 2025
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation