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Heavy Rain and Flooding in the Southern Plains

A cold front in the southern Plains will produce heavy rain and a flooding threat in the Arklatex area. These storms are expected to sink southward and weaken over South Texas on Thursday, and produce some moderate to locally heavy rainfall across southern Texas through the week. Read More >

Hazardous Weather Conditions

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

83°F

28°C

Humidity 82%
Wind Speed S 14 mph
Barometer 29.87 in (1010.5 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index92°F (33°C)
Last update 4 Oct 10:56 pm CDT
Extended Forecast for

3 Miles NNW San Marcos Municipal Airport TX

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 71. South wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Showers
    Likely

    Low: 71 °F

  • Thursday

    Thursday: Showers and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms, mainly between 1pm and 4pm. High near 83. North northeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    T-storms

    High: 83 °F

  • Thursday
    Night

    Thursday Night: A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 67. North wind around 10 mph.

    Slight Chance
    T-storms

    Low: 67 °F

  • Friday

    Friday: Partly sunny, with a high near 83. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.

    Partly Sunny

    High: 83 °F

  • Friday
    Night

    Friday Night: Mostly cloudy, with a low around 59. North northeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Mostly Cloudy

    Low: 59 °F

  • Saturday

    Saturday: Partly sunny, with a high near 75. North northeast wind 15 to 20 mph, with gusts as high as 30 mph.

    Partly Sunny

    High: 75 °F

  • Saturday
    Night

    Saturday Night: Partly cloudy, with a low around 52. Northeast wind 5 to 15 mph, with gusts as high as 20 mph.

    Partly Cloudy

    Low: 52 °F

  • Sunday

    Sunday: Mostly sunny, with a high near 79. North northeast wind 5 to 10 mph becoming south in the afternoon.

    Mostly Sunny

    High: 79 °F

  • Sunday
    Night

    Sunday Night: Mostly clear, with a low around 55. South wind 5 to 10 mph.

    Mostly Clear

    Low: 55 °F

Detailed Forecast

Tonight
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 71. South wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Showers and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms, mainly between 1pm and 4pm. High near 83. North northeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 67. North wind around 10 mph.
Friday
Partly sunny, with a high near 83. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Friday Night
Mostly cloudy, with a low around 59. North northeast wind 10 to 15 mph, with gusts as high as 20 mph.
Saturday
Partly sunny, with a high near 75. North northeast wind 15 to 20 mph, with gusts as high as 30 mph.
Saturday Night
Partly cloudy, with a low around 52. Northeast wind 5 to 15 mph, with gusts as high as 20 mph.
Sunday
Mostly sunny, with a high near 79. North northeast wind 5 to 10 mph becoming south in the afternoon.
Sunday Night
Mostly clear, with a low around 55. South wind 5 to 10 mph.
Columbus Day
Sunny, with a high near 84.
Monday Night
Mostly clear, with a low around 59.
Tuesday
Mostly sunny, with a high near 87.
Tuesday Night
Partly cloudy, with a low around 64.
Wednesday
Mostly sunny, with a high near 85.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
3 Miles NNW San Marcos Municipal Airport TX
 29.95°N 97.89°W (Elev. 646 ft)
Last Update:
2:42 pm CDT Oct 4, 2023
Forecast Valid:
11pm CDT Oct 4, 2023-6pm CDT Oct 11, 2023
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation