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

Excessive Rainfall Areas Today; Tropical Storm Jerry Forms

Heavy to excessive rainfall is possible today and tonight ahead of and along a cold front crossing portions of Kentucky, middle Tennessee, the Ohio Valley and New Mexico. Tropical Storm Jerry, the tenth named storm of the 2025 season, has formed over the central tropical Atlantic. Jerry is expected to be near or north of the northern Leeward Islands on Thursday and Friday. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

93°F

34°C

Humidity 41%
Wind Speed E 15 mph
Barometer 29.99 in (1014.5 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index96°F (36°C)
Last update 7 Oct 4:56 pm CDT
Extended Forecast for

San Marcos TX

  • This Afternoon

    This Afternoon: A 20 percent chance of sprinkles with a slight chance of showers. Mostly sunny, with a high near 93. East northeast wind around 5 mph.

    High: 93 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: A 10 percent chance of sprinkles with a slight chance of showers before 7pm. Partly cloudy, with a low around 71. Northeast wind around 5 mph becoming calm in the evening.

    Low: 71 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 93. Northeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 93 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 69. Northeast wind 5 to 10 mph.

    Low: 69 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 91. Northeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 91 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 64. Northeast wind around 5 mph.

    Low: 64 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 89. Northeast wind around 5 mph.

    High: 89 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 58. Northeast wind around 5 mph becoming calm in the evening.

    Low: 58 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 90. Calm wind becoming east southeast around 5 mph in the afternoon.

    High: 90 °F

    Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of sprinkles with a slight chance of showers. Mostly sunny, with a high near 93. East northeast wind around 5 mph.
Tonight
A 10 percent chance of sprinkles with a slight chance of showers before 7pm. Partly cloudy, with a low around 71. Northeast wind around 5 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 93. Northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 69. Northeast wind 5 to 10 mph.
Thursday
Sunny, with a high near 91. Northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday Night
Mostly clear, with a low around 64. Northeast wind around 5 mph.
Friday
Sunny, with a high near 89. Northeast wind around 5 mph.
Friday Night
Clear, with a low around 58. Northeast wind around 5 mph becoming calm in the evening.
Saturday
Sunny, with a high near 90. Calm wind becoming east southeast around 5 mph in the afternoon.
Saturday Night
Clear, with a low around 62.
Sunday
Sunny, with a high near 91.
Sunday Night
Mostly clear, with a low around 66.
Columbus Day
Sunny, with a high near 91.
Monday Night
Mostly clear, with a low around 65.
Tuesday
Sunny, with a high near 91.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
San Marcos TX
 29.88°N 97.94°W (Elev. 577 ft)
Last Update:
2:44 pm CDT Oct 7, 2025
Forecast Valid:
5pm CDT Oct 7, 2025-6pm CDT Oct 14, 2025
 
Forecast Discussion
 
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Additional Resources

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