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

Frigid Airmass to Bring Significantly Colder Temperatures; Snow Continues Downwind of the Great Lakes

A frigid cold airmass will bring significantly colder weather across the eastern two thirds of the country early this week. Record low temperatures are expected in the Southeast by Tuesday morning. Moderate to heavy lake effect snow will continue downwind of the Great Lakes through Monday. Several inches of snow accumulation is expected, including in portions of the Chicago Metro Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

52°F

11°C

Humidity 37%
Wind Speed N 13 mph
Barometer 30.52 in (1033.4 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill48°F (9°C)
Last update 9 Nov 11:56 pm CST
Extended Forecast for

6 Miles NW San Marcos TX

  • Overnight

    Overnight: Clear, with a low around 36. North wind around 10 mph.

    Low: 36 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 60. North northeast wind 5 to 10 mph.

    High: 60 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 34. Calm wind becoming south southwest around 5 mph after midnight.

    Low: 34 °F

    Clear

  • Veterans Day

    Veterans Day: Sunny, with a high near 71. South southwest wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 71 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 52. South southwest wind around 10 mph, with gusts as high as 20 mph.

    Low: 52 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 81. South southwest wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 81 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 57. South wind around 5 mph.

    Low: 57 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 83. South wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 83 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 61. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 61 °F

    Mostly Clear

Detailed Forecast

Overnight
Clear, with a low around 36. North wind around 10 mph.
Monday
Sunny, with a high near 60. North northeast wind 5 to 10 mph.
Monday Night
Clear, with a low around 34. Calm wind becoming south southwest around 5 mph after midnight.
Veterans Day
Sunny, with a high near 71. South southwest wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 30 mph.
Tuesday Night
Clear, with a low around 52. South southwest wind around 10 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 81. South southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
Mostly clear, with a low around 57. South wind around 5 mph.
Thursday
Sunny, with a high near 83. South wind 5 to 15 mph, with gusts as high as 25 mph.
Thursday Night
Mostly clear, with a low around 61. South wind around 10 mph, with gusts as high as 20 mph.
Friday
Mostly sunny, with a high near 83.
Friday Night
Mostly cloudy, with a low around 63.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 83.
Saturday Night
A 40 percent chance of showers. Partly cloudy, with a low around 52.
Sunday
A 20 percent chance of showers. Sunny, with a high near 73.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
6 Miles NW San Marcos TX
 29.95°N 98.02°W (Elev. 935 ft)
Last Update:
11:44 pm CST Nov 9, 2025
Forecast Valid:
12am CST Nov 10, 2025-6pm CST Nov 16, 2025
 
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