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

Dangerous Cold Persists through Monday; Wintry Weather from the Northern Plains to the Great Lakes

Bitter cold temperatures and dangerous wind chills will persist from Florida to the Northeast through Monday. Daily record low temperatures are forecast across the Southeast and Florida, with some all-time February low temperature records possible across Florida. An Alberta clipper will spread wintry precipitation across the Northern Plains today and into the upper Great Lakes into tonight. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Overcast

53°F

12°C

Humidity 37%
Wind Speed SW 9 mph
Barometer 30.45 in (1031.3 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 1 Feb 1:56 pm CST
Extended Forecast for

San Marcos TX

  • This Afternoon

    This Afternoon: Sunny, with a high near 58. South southwest wind around 5 mph.

    High: 58 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 38. Southwest wind around 5 mph.

    Low: 38 °F

    Mostly Clear

  • Monday

    Monday: Increasing clouds, with a high near 67. South southwest wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 67 °F

    Increasing
    Clouds

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 57. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 57 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 72. South southwest wind around 10 mph becoming north northwest in the afternoon.

    High: 72 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 44. North wind around 10 mph.

    Low: 44 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 66. North northeast wind around 10 mph, with gusts as high as 20 mph.

    High: 66 °F

    Mostly Sunny

  • Wednesday Night

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

    Low: 39 °F

    Mostly Clear

  • Thursday

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

    High: 65 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 58. South southwest wind around 5 mph.
Tonight
Mostly clear, with a low around 38. Southwest wind around 5 mph.
Monday
Increasing clouds, with a high near 67. South southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Monday Night
Mostly cloudy, with a low around 57. South wind around 10 mph, with gusts as high as 20 mph.
Tuesday
Partly sunny, with a high near 72. South southwest wind around 10 mph becoming north northwest in the afternoon.
Tuesday Night
Partly cloudy, with a low around 44. North wind around 10 mph.
Wednesday
Mostly sunny, with a high near 66. North northeast wind around 10 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 39. North wind 5 to 10 mph.
Thursday
Sunny, with a high near 65. North northwest wind around 5 mph becoming southwest in the afternoon.
Thursday Night
Mostly clear, with a low around 42.
Friday
Sunny, with a high near 73.
Friday Night
Mostly clear, with a low around 44.
Saturday
Sunny, with a high near 73.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
San Marcos TX
 29.88°N 97.94°W (Elev. 577 ft)
Last Update:
12:45 pm CST Feb 1, 2026
Forecast Valid:
2pm CST Feb 1, 2026-6pm CST Feb 7, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation