Severe Weather and Heavy Rain Shifts Into East

A strong and organized storm system will progress from the Ohio and Tennessee Valleys into the East. Expect severe weather with damaging winds across the Mid-Atlantic and Southeast, while the excessive rain risk moves from the Ohio Valley into the Northeast. Also, heat builds in parts of Texas and a cold storm system will carve into the northern Rockies for possible higher elevation snowfall. Read More >

Hazardous Weather Conditions

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

84°F

29°C

Humidity 82%
Wind Speed S 15 mph
Barometer 29.75 in (1006.5 mb)
Dewpoint 78°F (26°C)
Visibility 10.00 mi
Heat Index95°F (35°C)
Last update 19 Jun 9:56 pm CDT
Extended Forecast for

San Marcos TX

  • Tonight

    Tonight: Mostly cloudy, with a low around 76. South wind around 10 mph.

    Mostly Cloudy

    Low: 76 °F

  • Thursday

    Thursday: Mostly sunny and hot, with a high near 100. Heat index values as high as 110. South wind 10 to 15 mph, with gusts as high as 20 mph.

    Hot

    High: 100 °F

  • Thursday
    Night

    Thursday Night: Partly cloudy, with a low around 76. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Partly Cloudy

    Low: 76 °F

  • Friday

    Friday: Partly sunny, with a high near 97. Heat index values as high as 107. South wind around 15 mph, with gusts as high as 25 mph.

    Partly Sunny

    High: 97 °F

  • Friday
    Night

    Friday Night: Mostly cloudy, with a low around 77. South southeast wind 15 to 20 mph, with gusts as high as 25 mph.

    Mostly Cloudy

    Low: 77 °F

  • Saturday

    Saturday: Partly sunny, with a high near 94. South southeast wind 15 to 20 mph, with gusts as high as 25 mph.

    Partly Sunny

    High: 94 °F

  • Saturday
    Night

    Saturday Night: Mostly cloudy, with a low around 76. South southeast wind 15 to 20 mph, with gusts as high as 25 mph.

    Mostly Cloudy

    Low: 76 °F

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms.  Partly sunny, with a high near 94. South wind around 15 mph, with gusts as high as 25 mph.

    Slight Chance
    T-storms

    High: 94 °F

  • Sunday
    Night

    Sunday Night: A 20 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 76. South southeast wind around 15 mph, with gusts as high as 25 mph.

    Slight Chance
    T-storms

    Low: 76 °F

Detailed Forecast

Tonight
Mostly cloudy, with a low around 76. South wind around 10 mph.
Thursday
Mostly sunny and hot, with a high near 100. Heat index values as high as 110. South wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday Night
Partly cloudy, with a low around 76. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Friday
Partly sunny, with a high near 97. Heat index values as high as 107. South wind around 15 mph, with gusts as high as 25 mph.
Friday Night
Mostly cloudy, with a low around 77. South southeast wind 15 to 20 mph, with gusts as high as 25 mph.
Saturday
Partly sunny, with a high near 94. South southeast wind 15 to 20 mph, with gusts as high as 25 mph.
Saturday Night
Mostly cloudy, with a low around 76. South southeast wind 15 to 20 mph, with gusts as high as 25 mph.
Sunday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 94. South wind around 15 mph, with gusts as high as 25 mph.
Sunday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 76. South southeast wind around 15 mph, with gusts as high as 25 mph.
Monday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 92.
Monday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73.
Tuesday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 94.
Tuesday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73.
Wednesday
Mostly sunny, with a high near 94.
Click Map For Forecast
Point Forecast:
San Marcos TX
 29.88°N 97.94°W (Elev. 577 ft)
9:47 pm CDT Jun 19, 2019
11pm CDT Jun 19, 2019-6pm CDT Jun 26, 2019
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database