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.

Fog/Mist

23°C

74°F

Humidity 100%
Wind Speed S 13 km/h
Barometer 1008.7 mb (29.81 in)
Dewpoint 23°C (74°F)
Visibility 4.02 km
Last update 6 May 6:56 am CDT
Extended Forecast for

San Marcos TX

  • Today

    Today: A chance of showers, with thunderstorms also possible after 1pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 29. South wind 10 to 15 km/h increasing to 20 to 25 km/h in the afternoon. Winds could gust as high as 35 km/h. Chance of precipitation is 30%.

    High: 29 °C

    Chance
    Showers and
    Patchy Fog

  • Tonight

    Tonight: Mostly cloudy, with a low around 22. South southeast wind 15 to 20 km/h decreasing to 10 to 15 km/h after midnight. Winds could gust as high as 30 km/h.

    Low: 22 °C

    Mostly Cloudy

  • Tuesday

    Tuesday: Patchy fog before 10am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 33. South southeast wind 10 to 15 km/h.

    High: 33 °C

    Patchy Fog
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 22. South southeast wind 15 to 20 km/h.

    Low: 22 °C

    Increasing
    Clouds

  • Wednesday

    Wednesday: Partly sunny, with a high near 33. South wind 15 to 20 km/h.

    High: 33 °C

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 22. Southeast wind 10 to 20 km/h, with gusts as high as 30 km/h.

    Low: 22 °C

    Partly Cloudy

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 30. East southeast wind 10 to 15 km/h becoming northeast 15 to 20 km/h in the afternoon. Winds could gust as high as 30 km/h.

    High: 30 °C

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 19. North northeast wind 25 to 30 km/h, with gusts as high as 45 km/h.

    Low: 19 °C

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 27. Northeast wind 25 to 30 km/h, with gusts as high as 50 km/h.

    High: 27 °C

    Mostly Sunny

Detailed Forecast

Today
A chance of showers, with thunderstorms also possible after 1pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 29. South wind 10 to 15 km/h increasing to 20 to 25 km/h in the afternoon. Winds could gust as high as 35 km/h. Chance of precipitation is 30%.
Tonight
Mostly cloudy, with a low around 22. South southeast wind 15 to 20 km/h decreasing to 10 to 15 km/h after midnight. Winds could gust as high as 30 km/h.
Tuesday
Patchy fog before 10am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 33. South southeast wind 10 to 15 km/h.
Tuesday Night
Increasing clouds, with a low around 22. South southeast wind 15 to 20 km/h.
Wednesday
Partly sunny, with a high near 33. South wind 15 to 20 km/h.
Wednesday Night
Partly cloudy, with a low around 22. Southeast wind 10 to 20 km/h, with gusts as high as 30 km/h.
Thursday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 30. East southeast wind 10 to 15 km/h becoming northeast 15 to 20 km/h in the afternoon. Winds could gust as high as 30 km/h.
Thursday Night
Partly cloudy, with a low around 19. North northeast wind 25 to 30 km/h, with gusts as high as 45 km/h.
Friday
Mostly sunny, with a high near 27. Northeast wind 25 to 30 km/h, with gusts as high as 50 km/h.
Friday Night
Partly cloudy, with a low around 16.
Saturday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 27.
Saturday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 17.
Sunday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 26.
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ABOUT THIS FORECAST

 
Point Forecast:
San Marcos TX
 29.88°N 97.94°W (Elev. 577 m)
Last Update:
3:42 am CDT May 6, 2024
Forecast Valid:
7am CDT May 6, 2024-6pm CDT May 12, 2024
 
Forecast Discussion
 
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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