Thunderstorms and Heavy Rains Across Portions of the Central and Eastern US; Heat Expands to Portions of the East

Widespread showers and thunderstorms, some severe, may produce heavy downpours and flash flooding across much of the eastern and central U.S. Dangerous heat will continue in the Pacific Northwest and expand across portions of the East. Deep tropical moisture and associated thunderstorms will bring heavy rainfall and localized flash flooding across portions of Florida into the central Gulf Coast. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Mostly Cloudy

78°F

26°C

Humidity 100%
Wind Speed SE 8 mph
Barometer 29.98 in (1014.5 mb)
Dewpoint 78°F (26°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 16 Jul 12:56 am CDT
Extended Forecast for

2 Miles W San Marcos Municipal Airport TX

  • Overnight

    Overnight: Mostly clear early, then becoming mostly cloudy, with a low around 76. South wind around 5 mph.

    Low: 76 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Cloudy through mid morning, then gradual clearing, with a high near 96. Heat index values as high as 101. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 96 °F

    Gradual
    Clearing

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 72. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 72 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 96. Heat index values as high as 101. South wind around 5 mph.

    High: 96 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 72. Southeast wind around 5 mph becoming calm  after midnight.

    Low: 72 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 92. Calm wind becoming south around 5 mph in the afternoon.

    High: 92 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 75. Southeast wind around 5 mph.

    Low: 75 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 94. South wind 5 to 10 mph.

    High: 94 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 75. South southeast wind 5 to 10 mph.

    Low: 75 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear early, then becoming mostly cloudy, with a low around 76. South wind around 5 mph.
Wednesday
Cloudy through mid morning, then gradual clearing, with a high near 96. Heat index values as high as 101. South wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 72. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday
Mostly sunny, with a high near 96. Heat index values as high as 101. South wind around 5 mph.
Thursday Night
Partly cloudy, with a low around 72. Southeast wind around 5 mph becoming calm after midnight.
Friday
Mostly sunny, with a high near 92. Calm wind becoming south around 5 mph in the afternoon.
Friday Night
Mostly cloudy, with a low around 75. Southeast wind around 5 mph.
Saturday
Partly sunny, with a high near 94. South wind 5 to 10 mph.
Saturday Night
Partly cloudy, with a low around 75. South southeast wind 5 to 10 mph.
Sunday
Mostly sunny, with a high near 96.
Sunday Night
Partly cloudy, with a low around 75.
Monday
Mostly sunny, with a high near 97.
Monday Night
Partly cloudy, with a low around 75.
Tuesday
Mostly sunny, with a high near 97.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles W San Marcos Municipal Airport TX
 29.9°N 97.91°W (Elev. 640 ft)
12:44 am CDT Jul 16, 2025
1am CDT Jul 16, 2025-6pm CDT Jul 22, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database