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

45°F

7°C

Humidity 63%
Wind Speed Calm
Barometer 30.33 in (1027.0 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Last update 19 Jan 11:56 pm CST
Extended Forecast for

5 Miles WSW Martindale TX

  • Overnight

    Overnight: Mostly cloudy, with a low around 42. North wind around 5 mph.

    Low: 42 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 60. North wind 5 to 10 mph becoming east southeast in the afternoon.

    High: 60 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers, mainly after midnight.  Patchy fog between 2am and 5am.  Otherwise, cloudy, with a low around 52. East southeast wind around 5 mph.

    Low: 52 °F

    Chance
    Showers and
    Patchy Fog

  • Wednesday

    Wednesday: A 30 percent chance of showers, mainly before noon.  Cloudy, then gradually becoming mostly sunny, with a high near 70. South wind around 5 mph becoming east southeast in the afternoon.

    High: 70 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 55. East wind around 5 mph becoming north after midnight.

    Low: 55 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 72. North wind around 5 mph becoming southeast in the afternoon.

    High: 72 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 55. East southeast wind around 5 mph.

    Low: 55 °F

    Mostly Cloudy

  • Friday

    Friday: A 40 percent chance of showers, mainly after noon.  Cloudy, with a high near 69. East southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 69 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Showers likely.  Cloudy, with a low around 37. Northeast wind 10 to 15 mph, with gusts as high as 20 mph.  Chance of precipitation is 70%.

    Low: 37 °F

    Showers
    Likely

Detailed Forecast

Overnight
Mostly cloudy, with a low around 42. North wind around 5 mph.
Tuesday
Mostly cloudy, with a high near 60. North wind 5 to 10 mph becoming east southeast in the afternoon.
Tuesday Night
A 30 percent chance of showers, mainly after midnight. Patchy fog between 2am and 5am. Otherwise, cloudy, with a low around 52. East southeast wind around 5 mph.
Wednesday
A 30 percent chance of showers, mainly before noon. Cloudy, then gradually becoming mostly sunny, with a high near 70. South wind around 5 mph becoming east southeast in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 55. East wind around 5 mph becoming north after midnight.
Thursday
Partly sunny, with a high near 72. North wind around 5 mph becoming southeast in the afternoon.
Thursday Night
Mostly cloudy, with a low around 55. East southeast wind around 5 mph.
Friday
A 40 percent chance of showers, mainly after noon. Cloudy, with a high near 69. East southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
Showers likely. Cloudy, with a low around 37. Northeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Saturday
Showers likely, mainly before noon. Cloudy, with a high near 40. Chance of precipitation is 70%.
Saturday Night
A chance of freezing rain. Mostly cloudy, with a low around 24. Chance of precipitation is 40%.
Sunday
Partly sunny, with a high near 39.
Sunday Night
Partly cloudy, with a low around 24.
Monday
Mostly sunny, with a high near 45.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WSW Martindale TX
 29.81°N 97.91°W (Elev. 581 ft)
11:42 pm CST Jan 19, 2026
12am CST Jan 20, 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