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

Heavy Rain Continues in Florida; Cold Front Brings Thunderstorms and Showers to Central US

Scattered areas of heavy rain continue to produce isolated flash flooding across the Florida peninsula. Anomalous moisture will combine with a cold front and will bring heavy rain and scattered flash flooding across the Mid-South, Ohio and Tennessee Valleys today and Tuesday. Above average temperatures will continue to be found ahead of the cold front from the Midwest to the Northeast. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Mostly Cloudy

91°F

33°C

Humidity 45%
Wind Speed SE 5 mph
Barometer 29.97 in (1014.1 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Heat Index94°F (34°C)
Last update 6 Oct 12:56 pm CDT
Extended Forecast for

San Marcos Municipal Airport TX

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 94. East wind around 5 mph.

    High: 94 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 69. East wind around 5 mph becoming calm in the evening.

    Low: 69 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 95. Light and variable wind becoming east northeast 5 to 10 mph in the afternoon.

    High: 95 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 69. Northeast wind 5 to 10 mph.

    Low: 69 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 93. Northeast wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 93 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 67. Northeast wind 5 to 10 mph.

    Low: 67 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 93. Northeast wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 93 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 64. East northeast wind 5 to 10 mph.

    Low: 64 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 93. Northeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 93 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 94. East wind around 5 mph.
Tonight
Partly cloudy, with a low around 69. East wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 95. Light and variable wind becoming east northeast 5 to 10 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 69. Northeast wind 5 to 10 mph.
Wednesday
Mostly sunny, with a high near 93. Northeast wind 5 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 67. Northeast wind 5 to 10 mph.
Thursday
Sunny, with a high near 93. Northeast wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday Night
Mostly clear, with a low around 64. East northeast wind 5 to 10 mph.
Friday
Sunny, with a high near 93. Northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
Clear, with a low around 61.
Saturday
Sunny, with a high near 92.
Saturday Night
Clear, with a low around 62.
Sunday
Sunny, with a high near 92.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
San Marcos Municipal Airport TX
 29.9°N 97.86°W (Elev. 600 ft)
Last Update:
12:44 pm CDT Oct 6, 2025
Forecast Valid:
1pm CDT Oct 6, 2025-6pm CDT Oct 12, 2025
 
Forecast Discussion
 
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