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.

Fair

74°F

23°C

Humidity 94%
Wind Speed NW 9 mph
Barometer 29.72 in (1005.8 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 13 May 3:56 pm CDT
Extended Forecast for

San Marcos TX

  • Tonight

    Tonight: A slight chance of showers and thunderstorms between 7pm and 10pm. Patchy fog between 3am and 5am. Otherwise, mostly cloudy, then gradually becoming clear, with a low around 62. Northeast wind 5 to 10 mph becoming light and variable in the evening. Chance of precipitation is 20%.

    Low: 62 °F

    Slight Chance
    T-storms then
    Patchy Fog

  • Tuesday

    Tuesday: Patchy fog between 7am and 9am. Otherwise, sunny, with a high near 90. West wind around 5 mph becoming east in the afternoon.

    High: 90 °F

    Patchy Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 64. East southeast wind 5 to 10 mph becoming south southwest after midnight.

    Low: 64 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 90. South southeast wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 90 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 69. Southeast wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 69 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 4pm, then showers and thunderstorms likely after 4pm. Mostly cloudy, with a high near 86. Southeast wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    High: 86 °F

    Chance
    T-storms then
    T-storms
    Likely

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely, mainly before 7pm. Mostly cloudy, with a low around 69. Southeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    Low: 69 °F

    T-storms
    Likely then
    Chance
    T-storms

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly cloudy, with a high near 84. North wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 84 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 68. Northeast wind 5 to 10 mph.

    Low: 68 °F

    Slight Chance
    T-storms

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms between 7pm and 10pm. Patchy fog between 3am and 5am. Otherwise, mostly cloudy, then gradually becoming clear, with a low around 62. Northeast wind 5 to 10 mph becoming light and variable in the evening. Chance of precipitation is 20%.
Tuesday
Patchy fog between 7am and 9am. Otherwise, sunny, with a high near 90. West wind around 5 mph becoming east in the afternoon.
Tuesday Night
Mostly clear, with a low around 64. East southeast wind 5 to 10 mph becoming south southwest after midnight.
Wednesday
Mostly sunny, with a high near 90. South southeast wind 5 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 69. Southeast wind 5 to 15 mph, with gusts as high as 20 mph.
Thursday
A chance of showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 4pm, then showers and thunderstorms likely after 4pm. Mostly cloudy, with a high near 86. Southeast wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Thursday Night
Showers and thunderstorms likely, mainly before 7pm. Mostly cloudy, with a low around 69. Southeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Friday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly cloudy, with a high near 84. North wind 10 to 15 mph, with gusts as high as 20 mph.
Friday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 68. Northeast wind 5 to 10 mph.
Saturday
Mostly sunny, with a high near 90.
Saturday Night
Mostly clear, with a low around 70.
Sunday
Sunny, with a high near 93.
Sunday Night
Mostly clear, with a low around 71.
Monday
Sunny, with a high near 94.
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ABOUT THIS FORECAST

 
Point Forecast:
San Marcos TX
 29.88°N 97.91°W (Elev. 597 ft)
Last Update:
4:44 pm CDT May 13, 2024
Forecast Valid:
4pm CDT May 13, 2024-6pm CDT May 20, 2024
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation