Notice of NWS' New Version of Forecast
A new version of Forecast is coming soon!
Click here to visit the new site for details.

Severe Thunderstorms, Heavy Rain, Gusty Winds, And Flooding Potential From The Southeast U.S. To The Appalachians and Mid Atlantic Region

A slow moving low pressure system will track from the southern U.S. to the Mid Atlantic and Northeast early this week. The system will bring widespread rain, locally heavy from the Deep South to the Mid Atlantic Region. Localized flooding will be possible. In addition, the potential exists for strong to severe thunderstorms capable of damaging wind particularly over the Southeast U.S. into Monday. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

49°F

9°C

Humidity 86%
Wind Speed NW 7 mph
Barometer 30.06 in (1017.5 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Wind Chill46°F (8°C)
Last update 23 Apr 3:56 am CDT
Extended Forecast for

San Marcos TX

  • Today

    Today: Sunny, with a high near 84. North wind 5 to 10 mph.

    Sunny

    High: 84 °F

  • Tonight

    Tonight: Clear, with a low around 56. Northeast wind around 5 mph becoming calm  in the evening.

    Clear

    Low: 56 °F

  • Tuesday

    Tuesday: Sunny, with a high near 87. East northeast wind 5 to 10 mph becoming south in the morning.

    Sunny

    High: 87 °F

  • Tuesday
    Night

    Tuesday Night: Partly cloudy, with a low around 59. South southeast wind 5 to 10 mph.

    Partly Cloudy

    Low: 59 °F

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms.  Mostly cloudy, with a high near 79. North northeast wind 5 to 10 mph.

    Slight Chance
    T-storms

    High: 79 °F

  • Wednesday
    Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 53. North wind 5 to 15 mph, with gusts as high as 20 mph.

    Chance
    T-storms

    Low: 53 °F

  • Thursday

    Thursday: Mostly sunny, with a high near 77. North wind 5 to 10 mph becoming east northeast in the afternoon.

    Mostly Sunny

    High: 77 °F

  • Thursday
    Night

    Thursday Night: Partly cloudy, with a low around 56. East northeast wind around 5 mph.

    Partly Cloudy

    Low: 56 °F

  • Friday

    Friday: Mostly sunny, with a high near 79. North wind around 10 mph.

    Mostly Sunny

    High: 79 °F

Detailed Forecast

Today
Sunny, with a high near 84. North wind 5 to 10 mph.
Tonight
Clear, with a low around 56. Northeast wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 87. East northeast wind 5 to 10 mph becoming south in the morning.
Tuesday Night
Partly cloudy, with a low around 59. South southeast wind 5 to 10 mph.
Wednesday
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 79. North northeast wind 5 to 10 mph.
Wednesday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 53. North wind 5 to 15 mph, with gusts as high as 20 mph.
Thursday
Mostly sunny, with a high near 77. North wind 5 to 10 mph becoming east northeast in the afternoon.
Thursday Night
Partly cloudy, with a low around 56. East northeast wind around 5 mph.
Friday
Mostly sunny, with a high near 79. North wind around 10 mph.
Friday Night
Partly cloudy, with a low around 52.
Saturday
Mostly sunny, with a high near 78.
Saturday Night
Mostly cloudy, with a low around 56.
Sunday
Partly sunny, with a high near 79.
Click Map For Forecast
Point Forecast:
San Marcos TX
 29.9°N 97.91°W (Elev. 640 ft)
4:05 am CDT Apr 23, 2018
4am CDT Apr 23, 2018-6pm CDT Apr 29, 2018
 
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