Dangerous Heat in a Couple of Locations; Active Monsoon

Dangerous heat continues in a couple of locations today. In the Pacific Northwest to the central Valley of California and across the Gulf Coast region from the western Florida Panhandle to eastern Texas. Meanwhile, the monsoon threat of heavy rainfall and flooding will be possible in the Four Corners region and west Texas today, with a more significant threat on Friday in Arizona and New Mexico. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

A Few Clouds

83°F

28°C

Humidity 79%
Wind Speed SW 7 mph
Barometer 30.04 in (1016.0 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index91°F (33°C)
Last update 17 Aug 8:56 am CDT
Extended Forecast for

San Marcos TX

  • Today

    Today: Mostly sunny and hot, with a high near 99. Heat index values as high as 102. South wind 5 to 10 mph.

    Hot

    High: 99 °F

  • Tonight

    Tonight: Partly cloudy, with a low around 77. South southwest wind 5 to 10 mph.

    Partly Cloudy

    Low: 77 °F

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms after 1pm.  Mostly sunny and hot, with a high near 99. Heat index values as high as 105. Southwest wind around 5 mph becoming southeast in the afternoon.

    Mostly Sunny
    then Chance
    T-storms

    High: 99 °F

  • Thursday
    Night

    Thursday Night: A 50 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 73. North northeast wind 5 to 10 mph becoming south after midnight. Winds could gust as high as 20 mph.

    Chance
    T-storms

    Low: 73 °F

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms, mainly after 1pm.  Partly sunny, with a high near 93. South wind 5 to 10 mph becoming east southeast in the afternoon.

    Slight Chance
    T-storms then
    Chance
    T-storms

    High: 93 °F

  • Friday
    Night

    Friday Night: Partly cloudy, with a low around 73. East southeast wind 5 to 10 mph becoming south after midnight.

    Partly Cloudy

    Low: 73 °F

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 1pm.  Mostly sunny, with a high near 95. South wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.

    Mostly Sunny
    then Slight
    Chance
    T-storms

    High: 95 °F

  • Saturday
    Night

    Saturday Night: Partly cloudy, with a low around 76. South wind 5 to 15 mph, with gusts as high as 20 mph.

    Partly Cloudy

    Low: 76 °F

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 1pm.  Partly sunny, with a high near 94. South southeast wind 5 to 15 mph, with gusts as high as 25 mph.

    Partly Sunny
    then Slight
    Chance
    T-storms

    High: 94 °F

Detailed Forecast

Today
Mostly sunny and hot, with a high near 99. Heat index values as high as 102. South wind 5 to 10 mph.
Tonight
Partly cloudy, with a low around 77. South southwest wind 5 to 10 mph.
Thursday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 99. Heat index values as high as 105. Southwest wind around 5 mph becoming southeast in the afternoon.
Thursday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73. North northeast wind 5 to 10 mph becoming south after midnight. Winds could gust as high as 20 mph.
Friday
A 50 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 93. South wind 5 to 10 mph becoming east southeast in the afternoon.
Friday Night
Partly cloudy, with a low around 73. East southeast wind 5 to 10 mph becoming south after midnight.
Saturday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 95. South wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Saturday Night
Partly cloudy, with a low around 76. South wind 5 to 15 mph, with gusts as high as 20 mph.
Sunday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 94. South southeast wind 5 to 15 mph, with gusts as high as 25 mph.
Sunday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 76.
Monday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 97.
Monday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 75.
Tuesday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 95.
Click Map For Forecast
Point Forecast:
San Marcos TX
 29.88°N 97.94°W (Elev. 577 ft)
6:08 am CDT Aug 17, 2022
9am CDT Aug 17, 2022-6pm CDT Aug 23, 2022
 
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Additional Resources

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