Snow May Produce Poor Travel Conditions in the North-Central U.S. and East Coast

A strong cold front sweeping across the Northern Plains may bring snow showers and snow squalls from eastern Montana to north-central Nebraska, with blizzard conditions possible in eastern North Dakota and northwestern Montana. Heavy snow is expected to persist downwind of the Great Lakes. Snow showers will spread up the East Coast across the Mid-Atlantic and Northeast coasts. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

59°F

15°C

Humidity 16%
Wind Speed SW 10 mph
Barometer 30.33 in (1027.0 mb)
Dewpoint 13°F (-11°C)
Visibility 10.00 mi
Last update 18 Jan 12:56 pm CST
Extended Forecast for

San Marcos TX

  • This Afternoon

    This Afternoon: Sunny, with a high near 61. Southwest wind around 10 mph.

    High: 61 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 31. South southwest wind around 5 mph becoming west after midnight.

    Low: 31 °F

    Clear

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 65. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 65 °F

    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 43. Northeast wind 5 to 10 mph.

    Low: 43 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Cloudy, with a high near 58. North northeast wind 5 to 10 mph becoming east southeast in the afternoon.

    High: 58 °F

    Cloudy

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers, mainly after midnight.  Cloudy, with a low around 51. Southeast wind around 5 mph.

    Low: 51 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A 40 percent chance of showers, mainly before noon.  Mostly cloudy, with a high near 64. Southeast wind around 5 mph.

    High: 64 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 50. East southeast wind 5 to 10 mph becoming north northeast after midnight.

    Low: 50 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 63. North northeast wind around 5 mph.

    High: 63 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 61. Southwest wind around 10 mph.
Tonight
Clear, with a low around 31. South southwest wind around 5 mph becoming west after midnight.
M.L.King Day
Sunny, with a high near 65. Calm wind becoming southeast around 5 mph in the afternoon.
Monday Night
Increasing clouds, with a low around 43. Northeast wind 5 to 10 mph.
Tuesday
Cloudy, with a high near 58. North northeast wind 5 to 10 mph becoming east southeast in the afternoon.
Tuesday Night
A 30 percent chance of showers, mainly after midnight. Cloudy, with a low around 51. Southeast wind around 5 mph.
Wednesday
A 40 percent chance of showers, mainly before noon. Mostly cloudy, with a high near 64. Southeast wind around 5 mph.
Wednesday Night
Mostly cloudy, with a low around 50. East southeast wind 5 to 10 mph becoming north northeast after midnight.
Thursday
Partly sunny, with a high near 63. North northeast wind around 5 mph.
Thursday Night
Mostly cloudy, with a low around 46.
Friday
Partly sunny, with a high near 67.
Friday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 52.
Saturday
A 20 percent chance of showers. Mostly cloudy, with a high near 66.
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ABOUT THIS FORECAST

 
Point Forecast:
San Marcos TX
 29.88°N 97.94°W (Elev. 577 ft)
12:44 pm CST Jan 18, 2026
1pm CST Jan 18, 2026-6pm CST Jan 24, 2026
 
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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