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

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Mostly Cloudy

74°F

23°C

Humidity 85%
Wind Speed S 17 mph
Barometer 29.94 in (1013.0 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 16 May 12:56 am CDT
Extended Forecast for

5 Miles ENE Fischer TX

  • Overnight

    Overnight: Mostly cloudy, with a low around 68. South wind around 10 mph.

    Low: 68 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 90. South wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 90 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 75. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 75 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly cloudy, with a high near 90. South southeast wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 90 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 77. South southeast wind 10 to 15 mph, with gusts as high as 30 mph.

    Low: 77 °F

    Slight Chance
    T-storms

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 91. South southeast wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 91 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 78. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 78 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 91. South southeast wind around 10 mph, with gusts as high as 25 mph.

    High: 91 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 1am, then a slight chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 74. South southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    Low: 74 °F

    Showers
    Likely

Detailed Forecast

Overnight
Mostly cloudy, with a low around 68. South wind around 10 mph.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 90. South wind 10 to 15 mph, with gusts as high as 25 mph.
Saturday Night
Increasing clouds, with a low around 75. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday
Mostly cloudy, with a high near 90. South southeast wind 10 to 15 mph, with gusts as high as 30 mph.
Sunday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 77. South southeast wind 10 to 15 mph, with gusts as high as 30 mph.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 91. South southeast wind 10 to 15 mph, with gusts as high as 30 mph.
Monday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 78. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 91. South southeast wind around 10 mph, with gusts as high as 25 mph.
Tuesday Night
Showers likely and possibly a thunderstorm before 1am, then a slight chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 74. South southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Wednesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 85. Chance of precipitation is 70%.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71.
Thursday
Showers and thunderstorms likely. Mostly cloudy, with a high near 81. Chance of precipitation is 70%.
Thursday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 68. Chance of precipitation is 60%.
Friday
Showers and thunderstorms likely. Mostly cloudy, with a high near 80. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles ENE Fischer TX
 30.01°N 98.21°W (Elev. 997 ft)
Last Update:
1:24 am CDT May 16, 2026
Forecast Valid:
1am CDT May 16, 2026-6pm CDT May 22, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation