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

67°F

19°C

Humidity 97%
Wind Speed NE 5 mph
Barometer 29.86 in (1010.6 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 12 May 3:56 am CDT
Extended Forecast for

San Marcos TX

  • Overnight

    Overnight: A 40 percent chance of showers and thunderstorms. Cloudy, with a low around 67. East northeast wind around 5 mph.

    Low: 67 °F

    Chance
    T-storms

  • Sunday

    Sunday: A 50 percent chance of showers and thunderstorms, mainly before 4pm. Patchy fog between 8am and noon. Otherwise, mostly cloudy, with a high near 82. East northeast wind 5 to 10 mph becoming south in the afternoon. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 82 °F

    Chance
    T-storms and
    Patchy Fog

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms, mainly between 7pm and 10pm. Mostly cloudy, with a low around 71. East northeast wind 5 to 10 mph.

    Low: 71 °F

    Chance
    T-storms

  • Monday

    Monday: Showers and thunderstorms likely, mainly after 1pm. Some of the storms could be severe. Cloudy, then gradually becoming mostly sunny, with a high near 87. South southeast wind 5 to 10 mph becoming west southwest in the morning. Chance of precipitation is 60%.

    High: 87 °F

    Severe
    Thunderstorms

  • Monday Night

    Monday Night: Mostly clear, with a low around 65. North northeast wind 5 to 10 mph becoming light northeast.

    Low: 65 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 89. Northwest wind 5 to 10 mph becoming east northeast in the afternoon.

    High: 89 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 65. East wind 5 to 10 mph.

    Low: 65 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 87. East southeast wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 87 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 71 °F

    Chance
    T-storms

Detailed Forecast

Overnight
A 40 percent chance of showers and thunderstorms. Cloudy, with a low around 67. East northeast wind around 5 mph.
Sunday
A 50 percent chance of showers and thunderstorms, mainly before 4pm. Patchy fog between 8am and noon. Otherwise, mostly cloudy, with a high near 82. East northeast wind 5 to 10 mph becoming south in the afternoon. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
A 30 percent chance of showers and thunderstorms, mainly between 7pm and 10pm. Mostly cloudy, with a low around 71. East northeast wind 5 to 10 mph.
Monday
Showers and thunderstorms likely, mainly after 1pm. Some of the storms could be severe. Cloudy, then gradually becoming mostly sunny, with a high near 87. South southeast wind 5 to 10 mph becoming west southwest in the morning. Chance of precipitation is 60%.
Monday Night
Mostly clear, with a low around 65. North northeast wind 5 to 10 mph becoming light northeast.
Tuesday
Sunny, with a high near 89. Northwest wind 5 to 10 mph becoming east northeast in the afternoon.
Tuesday Night
Partly cloudy, with a low around 65. East wind 5 to 10 mph.
Wednesday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 87. East southeast wind 5 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 84.
Thursday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.
Friday
Mostly sunny, with a high near 85.
Friday Night
Partly cloudy, with a low around 68.
Saturday
Mostly sunny, with a high near 88.
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ABOUT THIS FORECAST

 
Point Forecast:
San Marcos TX
 29.88°N 97.94°W (Elev. 577 ft)
Last Update:
2:42 am CDT May 12, 2024
Forecast Valid:
4am CDT May 12, 2024-6pm CDT May 18, 2024
 
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