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Severe thunderstorms possible over the Mid Atlantic and Northeast U.S.

Severe thunderstorms may develop Monday afternoon and evening over portions of the Mid Atlantic and Northeast U.S. A few of the storms could contain damaging winds, large hail, and heavy rainfall. The severe weather threat will shift to the upper Midwest and Great Lakes by Tuesday and Wednesday of this 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

79°F

26°C

Humidity 65%
Wind Speed Calm
Barometer 29.95 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 24 Jul 12:15 am CDT
Extended Forecast for

San Marcos TX

  • Overnight

    Overnight: Partly cloudy, with a low around 76. South wind 5 to 10 mph.

    Partly Cloudy

    Low: 76 °F

  • Monday

    Monday: Mostly sunny and hot, with a high near 100. Heat index values as high as 103. South southwest wind 5 to 10 mph.

    Hot

    High: 100 °F

  • Monday
    Night

    Monday Night: Partly cloudy, with a low around 76. South southeast wind 5 to 10 mph.

    Partly Cloudy

    Low: 76 °F

  • Tuesday

    Tuesday: Partly sunny and hot, with a high near 99. Heat index values as high as 106. South wind 5 to 10 mph.

    Hot

    High: 99 °F

  • Tuesday
    Night

    Tuesday Night: Partly cloudy, with a low around 76. South southeast wind 5 to 10 mph.

    Partly Cloudy

    Low: 76 °F

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 100. South wind 5 to 10 mph.

    Hot

    High: 100 °F

  • Wednesday
    Night

    Wednesday Night: Mostly clear, with a low around 75. South wind 5 to 10 mph.

    Mostly Clear

    Low: 75 °F

  • Thursday

    Thursday: Sunny and hot, with a high near 101. South wind 5 to 10 mph.

    Hot

    High: 101 °F

  • Thursday
    Night

    Thursday Night: Mostly clear, with a low around 76. South southeast wind 5 to 10 mph.

    Mostly Clear

    Low: 76 °F

Detailed Forecast

Overnight
Partly cloudy, with a low around 76. South wind 5 to 10 mph.
Monday
Mostly sunny and hot, with a high near 100. Heat index values as high as 103. South southwest wind 5 to 10 mph.
Monday Night
Partly cloudy, with a low around 76. South southeast wind 5 to 10 mph.
Tuesday
Partly sunny and hot, with a high near 99. Heat index values as high as 106. South wind 5 to 10 mph.
Tuesday Night
Partly cloudy, with a low around 76. South southeast wind 5 to 10 mph.
Wednesday
Mostly sunny and hot, with a high near 100. South wind 5 to 10 mph.
Wednesday Night
Mostly clear, with a low around 75. South wind 5 to 10 mph.
Thursday
Sunny and hot, with a high near 101. South wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 76. South southeast wind 5 to 10 mph.
Friday
Sunny and hot, with a high near 102.
Friday Night
Mostly clear, with a low around 76.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 102.
Saturday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 76.
Sunday
A 20 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 102.
Click Map For Forecast
Point Forecast:
San Marcos TX
 29.88°N 97.94°W (Elev. 577 ft)
8:57 pm CDT Jul 23, 2017
12am CDT Jul 24, 2017-6pm CDT Jul 29, 2017
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database