Lake-effect Snow and Whiteout Conditions in the Great Lakes Region; Below-average Temperatures in the East

Heavy lake-effect and lake-enhanced snow will persist downwind of the Great Lakes and produce some whiteout conditions that could cause difficult travel conditions. A coastal low will produce moderate to heavy snow over parts of southern and eastern New England into the afternoon. Below average temperatures are expected across the eastern U.S., particularly with chilly morning temperatures. 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 55%
Wind Speed SE 7 mph
Barometer 30.30 in (1025.9 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 19 Jan 8:56 pm CST
Extended Forecast for

2 Miles SW Hays TX

  • Tonight

    Tonight: Mostly cloudy, with a low around 39. East wind around 5 mph becoming north after midnight.

    Low: 39 °F

    Mostly Cloudy

  • Tuesday

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

    High: 58 °F

    Cloudy

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers, mainly after midnight.  Cloudy, with a low around 49. Southeast wind around 5 mph.

    Low: 49 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A 40 percent chance of showers.  Mostly cloudy, with a high near 68. South wind around 5 mph becoming north in the afternoon.

    High: 68 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 49. North wind around 5 mph.

    Low: 49 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 70. North wind around 5 mph becoming east in the afternoon.

    High: 70 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 51. Southeast wind around 5 mph.

    Low: 51 °F

    Mostly Cloudy

  • Friday

    Friday: A 40 percent chance of showers, mainly after noon.  Cloudy, with a high near 67. Southeast wind 5 to 10 mph becoming east northeast in the afternoon. Winds could gust as high as 20 mph.

    High: 67 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Showers likely, mainly after midnight.  Cloudy, with a low around 30. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.  Chance of precipitation is 70%.

    Low: 30 °F

    Showers
    Likely

Detailed Forecast

Tonight
Mostly cloudy, with a low around 39. East wind around 5 mph becoming north after midnight.
Tuesday
Cloudy, with a high near 58. North wind around 5 mph becoming east southeast in the afternoon.
Tuesday Night
A 40 percent chance of showers, mainly after midnight. Cloudy, with a low around 49. Southeast wind around 5 mph.
Wednesday
A 40 percent chance of showers. Mostly cloudy, with a high near 68. South wind around 5 mph becoming north in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 49. North wind around 5 mph.
Thursday
Partly sunny, with a high near 70. North wind around 5 mph becoming east in the afternoon.
Thursday Night
Mostly cloudy, with a low around 51. Southeast wind around 5 mph.
Friday
A 40 percent chance of showers, mainly after noon. Cloudy, with a high near 67. Southeast wind 5 to 10 mph becoming east northeast in the afternoon. Winds could gust as high as 20 mph.
Friday Night
Showers likely, mainly after midnight. Cloudy, with a low around 30. North northeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.
Saturday
Rain showers likely before noon, then a chance of rain or freezing rain. Cloudy, with a high near 39. Chance of precipitation is 60%.
Saturday Night
A chance of freezing rain. Mostly cloudy, with a low around 21. Chance of precipitation is 30%.
Sunday
Partly sunny, with a high near 38.
Sunday Night
Mostly cloudy, with a low around 22.
Monday
Partly sunny, with a high near 45.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW Hays TX
 30.09°N 97.89°W (Elev. 801 ft)
5:42 pm CST Jan 19, 2026
9pm CST Jan 19, 2026-6pm CST Jan 26, 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