Hot in Parts of the West; Cold Blast Coming to the Central U.S.

Hot to extremely hot temperatures are in place much of this week across parts of California and the interior Northwest U.S. A blast of cold air will drop across the central and eastern U.S. later this week bringing below to well below normal temperatures. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Overcast

73°F

23°C

Humidity 94%
Wind Speed N 3 mph
Barometer 30.05 in (1016.9 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Last update 1 Sep 6:56 am CDT
Extended Forecast for

2 Miles WNW San Marcos Municipal Airport TX

Flood Watch September 1, 07:20am until September 1, 12:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch September 1, 07:20am until September 1, 12:00pm

    NOW until 12:00pm Mon

    Flood Watch

  • Labor Day

    High: 91 °F

    Chance
    Showers then
    Chance
    T-storms

  • Tonight

    Tonight: Partly cloudy, with a low around 72. Northeast wind around 5 mph becoming calm  in the evening.

    Low: 72 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 95. North northeast wind around 5 mph.

    High: 95 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 70. Northeast wind around 5 mph becoming calm  in the evening.

    Low: 70 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 97. North wind around 5 mph.

    High: 97 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 68. North northeast wind around 5 mph becoming calm  in the evening.

    Low: 68 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 98. Calm wind becoming south around 5 mph.

    High: 98 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 71. Southeast wind around 5 mph becoming calm  in the evening.

    Low: 71 °F

    Partly Cloudy

Detailed Forecast

Labor Day
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 91. Calm wind becoming north northeast around 5 mph in the morning.
Tonight
Partly cloudy, with a low around 72. Northeast wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 95. North northeast wind around 5 mph.
Tuesday Night
Mostly clear, with a low around 70. Northeast wind around 5 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 97. North wind around 5 mph.
Wednesday Night
Mostly clear, with a low around 68. North northeast wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 98. Calm wind becoming south around 5 mph.
Thursday Night
Partly cloudy, with a low around 71. Southeast wind around 5 mph becoming calm in the evening.
Friday
Mostly sunny, with a high near 97. South wind around 5 mph.
Friday Night
Mostly cloudy, with a low around 72.
Saturday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 92.
Saturday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Sunday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WNW San Marcos Municipal Airport TX
 29.9°N 97.91°W (Elev. 640 ft)
6:42 am CDT Sep 1, 2025
7am CDT Sep 1, 2025-6pm CDT Sep 7, 2025
 
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