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.

Overcast

53°F

12°C

Humidity 96%
Wind Speed N 17 mph
Barometer 30.12 in (1019.7 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Wind Chill48°F (9°C)
Last update 15 Nov 8:56 am CST
Extended Forecast for

4 Miles WSW Martindale TX

  • Today

    Today: Showers and possibly a thunderstorm before 3pm, then a slight chance of showers. High near 59. North northeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 59 °F

    Showers

  • Tonight

    Tonight: A slight chance of drizzle before 3am, then a slight chance of showers after 3am. Cloudy, with a low around 49. North northeast wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.

    Low: 49 °F

    Slight Chance
    Showers

  • Monday

    Monday: Mostly cloudy, with a high near 52. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 52 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 49. North northeast wind 5 to 10 mph.

    Low: 49 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 63. East northeast wind 5 to 10 mph.

    High: 63 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 53. Calm wind becoming northeast around 5 mph after midnight.

    Low: 53 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 69. East wind around 5 mph.

    High: 69 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 61. East wind around 5 mph.

    Low: 61 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 20 percent chance of showers after noon. Mostly cloudy, with a high near 73. East southeast wind around 5 mph.

    High: 73 °F

    Cloudy then
    Slight Chance
    Showers

Detailed Forecast

Today
Showers and possibly a thunderstorm before 3pm, then a slight chance of showers. High near 59. North northeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
A slight chance of drizzle before 3am, then a slight chance of showers after 3am. Cloudy, with a low around 49. North northeast wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
Monday
Mostly cloudy, with a high near 52. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Monday Night
Mostly cloudy, with a low around 49. North northeast wind 5 to 10 mph.
Tuesday
Mostly sunny, with a high near 63. East northeast wind 5 to 10 mph.
Tuesday Night
Partly cloudy, with a low around 53. Calm wind becoming northeast around 5 mph after midnight.
Wednesday
Mostly cloudy, with a high near 69. East wind around 5 mph.
Wednesday Night
Mostly cloudy, with a low around 61. East wind around 5 mph.
Thursday
A 20 percent chance of showers after noon. Mostly cloudy, with a high near 73. East southeast wind around 5 mph.
Thursday Night
Mostly cloudy, with a low around 60.
Friday
A 20 percent chance of showers. Partly sunny, with a high near 73.
Friday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 62.
Saturday
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 75.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WSW Martindale TX
 29.81°N 97.91°W (Elev. 581 ft)
Last Update:
10:32 am CST Nov 15, 2026
Forecast Valid:
11am CST Nov 15, 2026-6pm CST Nov 21, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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