National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Snow Squalls from the Upper Midwest to Great Lakes; High Winds in the Northern and Central Plains

An Arctic front will bring widespread snow squalls through Friday from the Upper Midwest to the Ohio Valley. Heavy snow rates and strong winds will lead to near-zero visibility and dangerous travel conditions. High winds will continue across the northern and central High Plains through Friday, with wind gusts above 60 mph likely, leading to hazardous travel conditions. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

46°F

8°C

Humidity 56%
Wind Speed SW 8 mph
Barometer 30.01 in (1016.1 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 15 Jan 10:56 pm CST
Extended Forecast for

San Marcos Municipal Airport TX

  • Tonight

    Tonight: Clear, with a low around 41. South southwest wind around 10 mph, with gusts as high as 20 mph.

    Low: 41 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 73. Southwest wind 10 to 15 mph becoming north in the afternoon. Winds could gust as high as 25 mph.

    High: 73 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 39. North northeast wind 10 to 15 mph, with gusts as high as 30 mph.

    Low: 39 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 55. North northeast wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 55 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 26. North northeast wind 5 to 10 mph becoming northwest after midnight. Winds could gust as high as 20 mph.

    Low: 26 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 60. West northwest wind 5 to 10 mph becoming south southwest in the afternoon.

    High: 60 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 36. South southwest wind around 5 mph.

    Low: 36 °F

    Mostly Clear

  • M.L.King Day

    M.L.King Day: Mostly sunny, with a high near 64. Southwest wind 5 to 10 mph becoming east in the afternoon.

    High: 64 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 42. Northeast wind around 5 mph.

    Low: 42 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Clear, with a low around 41. South southwest wind around 10 mph, with gusts as high as 20 mph.
Friday
Sunny, with a high near 73. Southwest wind 10 to 15 mph becoming north in the afternoon. Winds could gust as high as 25 mph.
Friday Night
Mostly clear, with a low around 39. North northeast wind 10 to 15 mph, with gusts as high as 30 mph.
Saturday
Mostly sunny, with a high near 55. North northeast wind 10 to 15 mph, with gusts as high as 30 mph.
Saturday Night
Mostly clear, with a low around 26. North northeast wind 5 to 10 mph becoming northwest after midnight. Winds could gust as high as 20 mph.
Sunday
Sunny, with a high near 60. West northwest wind 5 to 10 mph becoming south southwest in the afternoon.
Sunday Night
Mostly clear, with a low around 36. South southwest wind around 5 mph.
M.L.King Day
Mostly sunny, with a high near 64. Southwest wind 5 to 10 mph becoming east in the afternoon.
Monday Night
Mostly cloudy, with a low around 42. Northeast wind around 5 mph.
Tuesday
Cloudy, with a high near 57.
Tuesday Night
A 30 percent chance of showers. Cloudy, with a low around 47.
Wednesday
A 40 percent chance of showers. Cloudy, with a high near 65.
Wednesday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 53.
Thursday
Partly sunny, with a high near 71.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
San Marcos Municipal Airport TX
 29.88°N 97.86°W (Elev. 600 ft)
Last Update:
11:28 pm CST Jan 15, 2026
Forecast Valid:
11pm CST Jan 15, 2026-6pm CST Jan 22, 2026
 
Forecast Discussion
 
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