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

Above Average Temperatures for the West and Central Plains; Lake Effect Snow Continues

Well above average temperatures will prevail across the Plains and the West Coast this week, while a cold front will bring Arctic air to the South and East Coast Thursday and Friday. Lake effect snow is forecast downwind of the Great Lakes through Thursday along and behind the Arctic front, as well as mountain snow across the Southern Appalachians. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

41°F

5°C

Humidity 89%
Wind Speed SW 6 mph
Barometer 30.05 in (1017.7 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Wind Chill37°F (3°C)
Last update 14 Jan 6:56 am CST
Extended Forecast for

4 Miles NNW San Marcos Municipal Airport TX

  • Today

    Today: Sunny, with a high near 69. Breezy, with a west wind 10 to 15 mph becoming north 20 to 25 mph in the morning. Winds could gust as high as 35 mph.

    High: 69 °F

    Sunny then
    Sunny and
    Breezy

  • Tonight

    Tonight: Clear, with a low around 35. North wind 5 to 15 mph, with gusts as high as 25 mph.

    Low: 35 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 65. North northwest wind around 5 mph becoming south in the afternoon.

    High: 65 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 42. South wind 5 to 10 mph.

    Low: 42 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 71. Southwest wind around 10 mph becoming north in the afternoon. Winds could gust as high as 20 mph.

    High: 71 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 39. North northeast wind 5 to 10 mph.

    Low: 39 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 59. East northeast wind 5 to 10 mph.

    High: 59 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 33. East northeast wind around 5 mph becoming northwest after midnight.

    Low: 33 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 63. North wind 5 to 10 mph becoming south southeast in the afternoon. Winds could gust as high as 20 mph.

    High: 63 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 69. Breezy, with a west wind 10 to 15 mph becoming north 20 to 25 mph in the morning. Winds could gust as high as 35 mph.
Tonight
Clear, with a low around 35. North wind 5 to 15 mph, with gusts as high as 25 mph.
Thursday
Sunny, with a high near 65. North northwest wind around 5 mph becoming south in the afternoon.
Thursday Night
Clear, with a low around 42. South wind 5 to 10 mph.
Friday
Sunny, with a high near 71. Southwest wind around 10 mph becoming north in the afternoon. Winds could gust as high as 20 mph.
Friday Night
Mostly clear, with a low around 39. North northeast wind 5 to 10 mph.
Saturday
Mostly sunny, with a high near 59. East northeast wind 5 to 10 mph.
Saturday Night
Mostly clear, with a low around 33. East northeast wind around 5 mph becoming northwest after midnight.
Sunday
Sunny, with a high near 63. North wind 5 to 10 mph becoming south southeast in the afternoon. Winds could gust as high as 20 mph.
Sunday Night
Partly cloudy, with a low around 39.
M.L.King Day
Partly sunny, with a high near 65.
Monday Night
Mostly cloudy, with a low around 42.
Tuesday
Partly sunny, with a high near 59.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNW San Marcos Municipal Airport TX
 29.95°N 97.89°W (Elev. 646 ft)
Last Update:
6:30 am CST Jan 14, 2026
Forecast Valid:
7am CST Jan 14, 2026-6pm CST Jan 20, 2026
 
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Additional Resources

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