Storm Systems Continue to Impact the Pacific Northwest; Lake Effect Snow Continues

A second Pacific cold front will cross the Pacific Northwest Wednesday followed by another atmospheric river. Each of these features will bring additional periods of gusty winds, mountain snow, and heavy to excessive rainfall with renewed flooding. Heavy lake effect snow continues into Tuesday east of Lakes Erie and Ontario. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

49°F

9°C

Humidity 33%
Wind Speed S 6 mph
Barometer 30.29 in (1025.9 mb)
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill46°F (8°C)
Last update 15 Dec 6:56 pm CST
Extended Forecast for

2 Miles E San Marcos TX

  • Tonight

    Tonight: Mostly cloudy, with a low around 40. South southeast wind around 5 mph becoming calm.

    Low: 40 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Cloudy, with a high near 63. Calm wind becoming south around 5 mph in the morning.

    High: 63 °F

    Cloudy

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers.  Patchy fog after 9pm.  Otherwise, cloudy, with a low around 54. South wind around 5 mph becoming calm  in the evening.

    Low: 54 °F

    Chance
    Showers and
    Patchy Fog

  • Wednesday

    Wednesday: A chance of showers and thunderstorms.  Patchy fog before 11am.  Otherwise, cloudy, with a high near 68. Calm wind becoming southeast around 5 mph in the afternoon.  Chance of precipitation is 30%.

    High: 68 °F

    Chance
    Showers and
    Patchy Fog

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 59. South wind around 5 mph.

    Low: 59 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 79. South southwest wind 5 to 10 mph becoming north in the afternoon. Winds could gust as high as 20 mph.

    High: 79 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 45. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 45 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 69. North northeast wind around 5 mph becoming south southeast in the afternoon.

    High: 69 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 51. South southwest wind 5 to 10 mph.

    Low: 51 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 40. South southeast wind around 5 mph becoming calm.
Tuesday
Cloudy, with a high near 63. Calm wind becoming south around 5 mph in the morning.
Tuesday Night
A 30 percent chance of showers. Patchy fog after 9pm. Otherwise, cloudy, with a low around 54. South wind around 5 mph becoming calm in the evening.
Wednesday
A chance of showers and thunderstorms. Patchy fog before 11am. Otherwise, cloudy, with a high near 68. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 30%.
Wednesday Night
Mostly cloudy, with a low around 59. South wind around 5 mph.
Thursday
Mostly sunny, with a high near 79. South southwest wind 5 to 10 mph becoming north in the afternoon. Winds could gust as high as 20 mph.
Thursday Night
Mostly clear, with a low around 45. North northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Friday
Sunny, with a high near 69. North northeast wind around 5 mph becoming south southeast in the afternoon.
Friday Night
Mostly clear, with a low around 51. South southwest wind 5 to 10 mph.
Saturday
Mostly sunny, with a high near 78.
Saturday Night
Mostly clear, with a low around 57.
Sunday
Mostly sunny, with a high near 80.
Sunday Night
Partly cloudy, with a low around 57.
Monday
Partly sunny, with a high near 79.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles E San Marcos TX
 29.88°N 97.91°W (Elev. 597 ft)
5:46 pm CST Dec 15, 2025
7pm CST Dec 15, 2025-6pm CST Dec 22, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database