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

Active Pattern for the Center of the Nation

Severe thunderstorms, excessive rainfall, critical fire weather are all in the outlook today and into this last weekend of April. Very large hail, severe wind gusts, and a couple strong tornadoes will all be possible across the central and southern Plains today. Flash flooding also possible for portions of the Plains and Mississippi Valley. Critical fire weather conditions for Southern High Plains Read More >

Hazardous Weather Conditions

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Overcast

75°F

24°C

Humidity 84%
Wind Speed S 15 G 22 mph
Barometer 30.01 in (1015.5 mb)
Dewpoint 70°F (21°C)
Visibility 7.00 mi
Last update 25 Apr 9:56 am CDT
Extended Forecast for

San Marcos TX

  • Today

    Today: Mostly cloudy, with a high near 84. South southeast wind 15 to 20 mph, with gusts as high as 30 mph.

    Mostly Cloudy

    High: 84 °F

  • Tonight

    Tonight: Mostly cloudy, with a low around 71. South southeast wind 15 to 20 mph, with gusts as high as 30 mph.

    Mostly Cloudy

    Low: 71 °F

  • Friday

    Friday: A chance of showers and thunderstorms. Mostly cloudy, with a high near 83. South wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Chance
    Showers

    High: 83 °F

  • Friday
    Night

    Friday Night: A 10 percent chance of showers before 7pm. Increasing clouds, with a low around 70. South southeast wind around 15 mph, with gusts as high as 25 mph.

    Slight Chance
    Showers then
    Mostly Cloudy

    Low: 70 °F

  • Saturday

    Saturday: Partly sunny, with a high near 85. Breezy, with a south southeast wind 15 to 20 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 40 mph.

    Partly Sunny
    and Breezy

    High: 85 °F

  • Saturday
    Night

    Saturday Night: A 30 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 70. Breezy, with a south southeast wind 20 to 25 mph, with gusts as high as 40 mph.

    Breezy.
    Mostly Cloudy
    then Chance
    T-storms

    Low: 70 °F

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 80. South wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.

    Showers
    Likely

    High: 80 °F

  • Sunday
    Night

    Sunday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 68. East southeast wind around 10 mph becoming south after midnight.

    Chance
    T-storms

    Low: 68 °F

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 84. South wind around 10 mph, with gusts as high as 20 mph.

    Slight Chance
    T-storms then
    Chance
    T-storms

    High: 84 °F

Detailed Forecast

Today
Mostly cloudy, with a high near 84. South southeast wind 15 to 20 mph, with gusts as high as 30 mph.
Tonight
Mostly cloudy, with a low around 71. South southeast wind 15 to 20 mph, with gusts as high as 30 mph.
Friday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 83. South wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
A 10 percent chance of showers before 7pm. Increasing clouds, with a low around 70. South southeast wind around 15 mph, with gusts as high as 25 mph.
Saturday
Partly sunny, with a high near 85. Breezy, with a south southeast wind 15 to 20 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 40 mph.
Saturday Night
A 30 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 70. Breezy, with a south southeast wind 20 to 25 mph, with gusts as high as 40 mph.
Sunday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 80. South wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.
Sunday Night
A 30 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 68. East southeast wind around 10 mph becoming south after midnight.
Monday
A 50 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 84. South wind around 10 mph, with gusts as high as 20 mph.
Monday Night
A 30 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 67.
Tuesday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 83.
Tuesday Night
Mostly cloudy, with a low around 67.
Wednesday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 83.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
San Marcos TX
 29.88°N 97.94°W (Elev. 577 ft)
Last Update:
2:48 am CDT Apr 25, 2024
Forecast Valid:
10am CDT Apr 25, 2024-6pm CDT May 1, 2024
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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