National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Overcast with Haze

86°F

30°C

Humidity 72%
Wind Speed W 6 mph
Barometer 29.61 in (1001.8 mb)
Dewpoint 76°F (24°C)
Visibility 2.00 mi
Heat Index96°F (36°C)
Last update 8 May 3:56 pm CDT
Extended Forecast for

San Marcos TX

  • Tonight

    Tonight: Patchy fog after 2am. Otherwise, increasing clouds, with a low around 73. South wind 5 to 10 mph.

    Low: 73 °F

    Partly Cloudy
    then Patchy
    Fog

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 1pm. Patchy fog before 10am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 92. Heat index values as high as 102. East southeast wind 5 to 10 mph.

    High: 92 °F

    Patchy Fog
    then Slight
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 68. Northeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 68 °F

    Increasing
    Clouds

  • Friday

    Friday: Partly sunny, with a high near 83. North northeast wind around 15 mph, with gusts as high as 25 mph.

    High: 83 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 65. Northeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 65 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 81. East wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 81 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66. East southeast wind around 10 mph.

    Low: 66 °F

    Chance
    T-storms

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm before 1pm, then showers and thunderstorms likely after 1pm. Mostly cloudy, with a high near 79. Southeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    High: 79 °F

    Showers
    Likely then
    T-storms
    Likely

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 68. Southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 68 °F

    Chance
    T-storms

Detailed Forecast

Tonight
Patchy fog after 2am. Otherwise, increasing clouds, with a low around 73. South wind 5 to 10 mph.
Thursday
A 20 percent chance of showers and thunderstorms after 1pm. Patchy fog before 10am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 92. Heat index values as high as 102. East southeast wind 5 to 10 mph.
Thursday Night
Increasing clouds, with a low around 68. Northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Friday
Partly sunny, with a high near 83. North northeast wind around 15 mph, with gusts as high as 25 mph.
Friday Night
Mostly cloudy, with a low around 65. Northeast wind 10 to 15 mph, with gusts as high as 20 mph.
Saturday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 81. East wind 10 to 15 mph, with gusts as high as 20 mph.
Saturday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66. East southeast wind around 10 mph.
Sunday
Showers likely and possibly a thunderstorm before 1pm, then showers and thunderstorms likely after 1pm. Mostly cloudy, with a high near 79. Southeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Sunday Night
A 30 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 68. Southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Monday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 84.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 65.
Tuesday
Mostly sunny, with a high near 88.
Tuesday Night
Partly cloudy, with a low around 67.
Wednesday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 89.
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ABOUT THIS FORECAST

 
Point Forecast:
San Marcos TX
 29.88°N 97.91°W (Elev. 597 ft)
Last Update:
3:42 pm CDT May 8, 2024
Forecast Valid:
4pm CDT May 8, 2024-6pm CDT May 15, 2024
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation