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

Showers and Thunderstorms in the Southwest and Ohio Valley; Mountain Snow in the Northeast

Showers and thunderstorms, along with high-elevation snow, will begin to develop over parts of the Southwest late tonight and is expected to continue through Wednesday morning. Mountain snow over parts the Northeast will continue through Tuesday. A few strong to severe storms and heavy rainfall are possible across portions of the Lower Ohio Valley Tuesday. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Overcast

72°F

22°C

Humidity 91%
Wind Speed NA
Barometer 30.00 in (1015.0 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 18 Nov 6:56 am CST
Extended Forecast for

2 Miles W San Marcos TX

  • Today

    Today: A slight chance of drizzle before 10am. Cloudy, then gradually becoming mostly sunny, with a high near 84. South wind 5 to 10 mph.

    High: 84 °F

    Slight Chance
    Drizzle then
    Partly Sunny

  • Tonight

    Tonight: A slight chance of drizzle after midnight. Increasing clouds, with a low around 68. South wind around 5 mph.

    Low: 68 °F

    Partly Cloudy
    then Slight
    Chance
    Drizzle

  • Wednesday

    Wednesday: A chance of drizzle before noon, then a slight chance of showers after noon. Mostly cloudy, with a high near 84. South southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 84 °F

    Chance
    Drizzle

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms. Cloudy, with a low around 68. South southeast wind 5 to 10 mph.

    Low: 68 °F

    Chance
    Showers

  • Thursday

    Thursday: Showers likely, with thunderstorms also possible after 9am. Mostly cloudy, with a high near 78. South southeast wind around 10 mph becoming southwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 70%.

    High: 78 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before midnight, then a chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 63. Southeast wind 5 to 10 mph becoming west after midnight. Chance of precipitation is 70%.

    Low: 63 °F

    Showers
    Likely

  • Friday

    Friday: A 30 percent chance of showers before noon. Mostly sunny, with a high near 80. Northwest wind around 5 mph.

    High: 80 °F

    Chance
    Showers then
    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 57. North wind around 5 mph.

    Low: 57 °F

    Mostly Clear

  • Saturday

    Saturday: A 20 percent chance of showers. Mostly sunny, with a high near 75. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 75 °F

    Slight Chance
    Showers

Detailed Forecast

Today
A slight chance of drizzle before 10am. Cloudy, then gradually becoming mostly sunny, with a high near 84. South wind 5 to 10 mph.
Tonight
A slight chance of drizzle after midnight. Increasing clouds, with a low around 68. South wind around 5 mph.
Wednesday
A chance of drizzle before noon, then a slight chance of showers after noon. Mostly cloudy, with a high near 84. South southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Wednesday Night
A 30 percent chance of showers and thunderstorms. Cloudy, with a low around 68. South southeast wind 5 to 10 mph.
Thursday
Showers likely, with thunderstorms also possible after 9am. Mostly cloudy, with a high near 78. South southeast wind around 10 mph becoming southwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 70%.
Thursday Night
Showers likely and possibly a thunderstorm before midnight, then a chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 63. Southeast wind 5 to 10 mph becoming west after midnight. Chance of precipitation is 70%.
Friday
A 30 percent chance of showers before noon. Mostly sunny, with a high near 80. Northwest wind around 5 mph.
Friday Night
Mostly clear, with a low around 57. North wind around 5 mph.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 75. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday Night
A 30 percent chance of showers, mainly after midnight. Partly cloudy, with a low around 54.
Sunday
A 30 percent chance of showers. Partly sunny, with a high near 73.
Sunday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 56.
Monday
A 40 percent chance of showers. Partly sunny, with a high near 74.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles W San Marcos TX
 29.88°N 97.97°W (Elev. 699 ft)
Last Update:
5:42 am CST Nov 18, 2025
Forecast Valid:
7am CST Nov 18, 2025-6pm CST Nov 24, 2025
 
Forecast Discussion
 
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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