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Excessive Heat in parts of the Central and Southern U.S.

Heat Advisories and Excessive Heat Warnings extend from the Southern Plains into the Mid-Atlantic and Southeast today. High temperatures for these areas will mostly be in the upper 90s. A few locations may exceed 100. Hot temperatures combined with high dew points will create heat index values of 100 to 115 degrees. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

A Few Clouds

84°F

29°C

Humidity 55%
Wind Speed S 17 mph
Barometer 29.97 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 23 Jul 9:45 am CDT
Extended Forecast for

San Marcos TX

  • Today

    Today: A 20 percent chance of showers and thunderstorms after 11am.  Mostly sunny and hot, with a high near 102. Heat index values as high as 106. South wind 5 to 10 mph.

    Slight Chance
    T-storms

    High: 102 °F

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 8pm.  Partly cloudy, with a low around 75. South southeast wind 5 to 10 mph.

    Slight Chance
    T-storms then
    Partly Cloudy

    Low: 75 °F

  • Monday

    Monday: Mostly sunny and hot, with a high near 101. South wind 5 to 10 mph.

    Hot

    High: 101 °F

  • Monday
    Night

    Monday Night: Partly cloudy, with a low around 76. South southeast wind 5 to 10 mph.

    Partly Cloudy

    Low: 76 °F

  • Tuesday

    Tuesday: Mostly sunny and hot, with a high near 100. South wind 5 to 10 mph.

    Hot

    High: 100 °F

  • Tuesday
    Night

    Tuesday Night: Partly cloudy, with a low around 76. South southeast wind 5 to 10 mph.

    Partly Cloudy

    Low: 76 °F

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 101. South wind 5 to 10 mph.

    Hot

    High: 101 °F

  • Wednesday
    Night

    Wednesday Night: Partly cloudy, with a low around 75. South wind 5 to 10 mph.

    Partly Cloudy

    Low: 75 °F

  • Thursday

    Thursday: Mostly sunny and hot, with a high near 103. South wind 5 to 10 mph.

    Hot

    High: 103 °F

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms after 11am. Mostly sunny and hot, with a high near 102. Heat index values as high as 106. South wind 5 to 10 mph.
Tonight
A 20 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 75. South southeast wind 5 to 10 mph.
Monday
Mostly sunny and hot, with a high near 101. South wind 5 to 10 mph.
Monday Night
Partly cloudy, with a low around 76. South southeast wind 5 to 10 mph.
Tuesday
Mostly sunny and hot, with a high near 100. South wind 5 to 10 mph.
Tuesday Night
Partly cloudy, with a low around 76. South southeast wind 5 to 10 mph.
Wednesday
Mostly sunny and hot, with a high near 101. South wind 5 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 75. South wind 5 to 10 mph.
Thursday
Mostly sunny and hot, with a high near 103. South wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 76.
Friday
Sunny and hot, with a high near 103.
Friday Night
Mostly clear, with a low around 76.
Saturday
Sunny and hot, with a high near 103.
Click Map For Forecast
Point Forecast:
San Marcos TX
 29.88°N 97.94°W (Elev. 577 ft)
6:23 am CDT Jul 23, 2017
10am CDT Jul 23, 2017-6pm CDT Jul 29, 2017
 
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