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

Hazardous Weather Conditions

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Overcast

80°F

27°C

Humidity 90%
Wind Speed S 9 mph
Barometer 29.83 in (1009.0 mb)
Dewpoint 77°F (25°C)
Visibility 7.00 mi
Heat Index86°F (30°C)
Last update 22 May 2:56 am CDT
Extended Forecast for

San Marcos TX

  • Overnight

    Overnight: Widespread haze. Cloudy, with a low around 77. South wind around 10 mph.

    Low: 77 °F

    Haze

  • Wednesday

    Wednesday: Widespread haze before noon. Cloudy through mid morning, then gradual clearing, with a high near 95. Heat index values as high as 105. South wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 95 °F

    Haze then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms between 10pm and 1am. Increasing clouds, with a low around 75. Southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 75 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: Partly sunny, with a high near 96. Heat index values as high as 105. South wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 96 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 75. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 75 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 97. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 97 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 74. South southeast wind 5 to 10 mph.

    Low: 74 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 98. South wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 98 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 75. South southeast wind 5 to 15 mph, with gusts as high as 25 mph.

    Low: 75 °F

    Partly Cloudy

Detailed Forecast

Overnight
Widespread haze. Cloudy, with a low around 77. South wind around 10 mph.
Wednesday
Widespread haze before noon. Cloudy through mid morning, then gradual clearing, with a high near 95. Heat index values as high as 105. South wind 5 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
A slight chance of showers and thunderstorms between 10pm and 1am. Increasing clouds, with a low around 75. Southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Thursday
Partly sunny, with a high near 96. Heat index values as high as 105. South wind 5 to 15 mph, with gusts as high as 25 mph.
Thursday Night
Partly cloudy, with a low around 75. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.
Friday
Mostly sunny, with a high near 97. South wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
Partly cloudy, with a low around 74. South southeast wind 5 to 10 mph.
Saturday
Mostly sunny, with a high near 98. South wind 5 to 15 mph, with gusts as high as 20 mph.
Saturday Night
Partly cloudy, with a low around 75. South southeast wind 5 to 15 mph, with gusts as high as 25 mph.
Sunday
Sunny and hot, with a high near 101.
Sunday Night
Mostly clear, with a low around 74.
Memorial Day
Sunny and hot, with a high near 101.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Tuesday
Mostly sunny, with a high near 93.
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Disclaimer
Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
San Marcos TX
 29.9°N 97.91°W (Elev. 640 ft)
Last Update:
3:44 am CDT May 22, 2024
Forecast Valid:
3am CDT May 22, 2024-6pm CDT May 28, 2024
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation