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.

Fog/Mist

68°F

20°C

Humidity 100%
Wind Speed N 6 mph
Barometer 29.77 in (1007.4 mb)
Dewpoint 68°F (20°C)
Visibility 5.00 mi
Last update 13 May 6:56 am CDT
Extended Forecast for

San Marcos TX

  • Today

    Today: Showers and thunderstorms likely, mainly between 1pm and 4pm. Some of the storms could be severe. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 86. North northeast wind 5 to 10 mph becoming southwest in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 86 °F

    Severe
    Thunderstorms
    and Patchy
    Fog

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms before 7pm. Some of the storms could be severe. Mostly clear, with a low around 63. North wind 5 to 10 mph becoming west after midnight.

    Low: 63 °F

    Severe
    Thunderstorms
    then Mostly
    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 90. West northwest wind 5 to 10 mph becoming east northeast in the afternoon.

    High: 90 °F

    Sunny

  • Tuesday Night

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

    Low: 64 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 89. Light south wind becoming southeast 10 to 15 mph in the morning. Winds could gust as high as 20 mph.

    High: 89 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 70. Southeast wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 70 °F

    Mostly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: Showers and thunderstorms likely, mainly after 1pm. Mostly cloudy, with a high near 84. East southeast wind around 10 mph. Chance of precipitation is 70%.

    High: 84 °F

    Chance
    T-storms then
    T-storms
    Likely

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 71. East wind around 10 mph, with gusts as high as 20 mph.

    Low: 71 °F

    Chance
    T-storms

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 86. Northeast wind around 10 mph.

    High: 86 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

Detailed Forecast

Today
Showers and thunderstorms likely, mainly between 1pm and 4pm. Some of the storms could be severe. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 86. North northeast wind 5 to 10 mph becoming southwest in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
A 30 percent chance of showers and thunderstorms before 7pm. Some of the storms could be severe. Mostly clear, with a low around 63. North wind 5 to 10 mph becoming west after midnight.
Tuesday
Sunny, with a high near 90. West northwest wind 5 to 10 mph becoming east northeast in the afternoon.
Tuesday Night
Mostly clear, with a low around 64. East wind 5 to 10 mph becoming south after midnight.
Wednesday
Mostly sunny, with a high near 89. Light south wind becoming southeast 10 to 15 mph in the morning. Winds could gust as high as 20 mph.
Wednesday Night
A 30 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 70. Southeast wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday
Showers and thunderstorms likely, mainly after 1pm. Mostly cloudy, with a high near 84. East southeast wind around 10 mph. Chance of precipitation is 70%.
Thursday Night
A 30 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 71. East wind around 10 mph, with gusts as high as 20 mph.
Friday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 86. Northeast wind around 10 mph.
Friday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 69.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Saturday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Sunday
Mostly sunny, with a high near 91.
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Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
San Marcos TX
 29.88°N 97.94°W (Elev. 577 ft)
Last Update:
6:42 am CDT May 13, 2024
Forecast Valid:
7am CDT May 13, 2024-6pm CDT May 19, 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