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.

Partly Cloudy

34°C

93°F

Humidity 52%
Wind Speed E 15 km/h
Barometer 1009.1 mb (29.82 in)
Dewpoint 23°C (73°F)
Visibility 16 km
Heat Index39°C (102°F)
Last update 15 Jun 5:56 pm CDT
Extended Forecast for

San Marcos TX

  • Tonight

    Tonight: Partly cloudy, with a low around 23. Southeast wind 15 to 20 km/h decreasing to 5 to 10 km/h after midnight.

    Low: 23 °C

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 35. Heat index values as high as 38. South southeast wind 5 to 10 km/h increasing to 10 to 15 km/h in the afternoon. Winds could gust as high as 30 km/h.

    High: 35 °C

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 23. Southeast wind 10 to 15 km/h, with gusts as high as 30 km/h.

    Low: 23 °C

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 35. Heat index values as high as 39. Southeast wind 5 to 10 km/h increasing to 10 to 15 km/h in the afternoon. Winds could gust as high as 35 km/h.

    High: 35 °C

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 23. East southeast wind 10 to 20 km/h, with gusts as high as 35 km/h.

    Low: 23 °C

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 33. East southeast wind 10 to 20 km/h, with gusts as high as 35 km/h.

    High: 33 °C

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 23. East wind 10 to 20 km/h, with gusts as high as 35 km/h.

    Low: 23 °C

    Partly Cloudy

  • Juneteenth

    Juneteenth: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 29. Northeast wind 10 to 15 km/h increasing to 20 to 25 km/h in the afternoon. Winds could gust as high as 40 km/h.

    High: 29 °C

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 23. East wind 15 to 20 km/h, with gusts as high as 35 km/h.

    Low: 23 °C

    Chance
    T-storms

Detailed Forecast

Tonight
Partly cloudy, with a low around 23. Southeast wind 15 to 20 km/h decreasing to 5 to 10 km/h after midnight.
Sunday
Mostly sunny, with a high near 35. Heat index values as high as 38. South southeast wind 5 to 10 km/h increasing to 10 to 15 km/h in the afternoon. Winds could gust as high as 30 km/h.
Sunday Night
Mostly clear, with a low around 23. Southeast wind 10 to 15 km/h, with gusts as high as 30 km/h.
Monday
Mostly sunny, with a high near 35. Heat index values as high as 39. Southeast wind 5 to 10 km/h increasing to 10 to 15 km/h in the afternoon. Winds could gust as high as 35 km/h.
Monday Night
Partly cloudy, with a low around 23. East southeast wind 10 to 20 km/h, with gusts as high as 35 km/h.
Tuesday
Mostly sunny, with a high near 33. East southeast wind 10 to 20 km/h, with gusts as high as 35 km/h.
Tuesday Night
Partly cloudy, with a low around 23. East wind 10 to 20 km/h, with gusts as high as 35 km/h.
Juneteenth
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 29. Northeast wind 10 to 15 km/h increasing to 20 to 25 km/h in the afternoon. Winds could gust as high as 40 km/h.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 23. East wind 15 to 20 km/h, with gusts as high as 35 km/h.
Thursday
Showers likely and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a high near 30. Chance of precipitation is 60%.
Thursday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 22.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 31.
Friday Night
Partly cloudy, with a low around 22.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 32.
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ABOUT THIS FORECAST

 
Point Forecast:
San Marcos TX
 29.88°N 97.94°W (Elev. 577 m)
Last Update:
6:00 pm CDT Jun 15, 2024
Forecast Valid:
6pm CDT Jun 15, 2024-6pm CDT Jun 22, 2024
 
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Additional Resources

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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