Heavy Lake Effect Snow Downwind of Lakes Erie and Ontario; Fire Weather Concerns in the Southern Plains and Southeast
A multi-day heavy lake effect snow event is expected downwind of Lakes Erie and Ontario through New Year's Day. There is increasing confidence in snow squalls causing bursts of snow & gusty winds on New Year's Eve. Elevated fire weather conditions will continue today over parts of the Southern Plains and across much of the Southeast U.S. Read More >
Current conditions at
San Marcos, San Marcos Municipal Airport (KHYI)
Lat: 29.89°NLon: 97.86°WElev: 597ft.
Fair
47°F
8°C
| Humidity | 30% |
| Wind Speed | NE 8 mph |
| Barometer | 30.59 in (1035.8 mb) |
| Dewpoint | 17°F (-8°C) |
| Visibility | 10.00 mi |
| Wind Chill | 43°F (6°C) |
| Last update | 30 Dec 9:56 am CST |
Extended Forecast for
San Marcos TX
Today
High: 57 °F
Sunny
Tonight
Low: 31 °F
Clear
Wednesday
High: 67 °F
Sunny
Wednesday Night
Low: 42 °F
Increasing
CloudsNew Year's Day
High: 73 °F
Partly Sunny
Thursday Night
Low: 55 °F
Partly Cloudy
Friday
High: 84 °F
Sunny
Friday Night
Low: 52 °F
Clear
Saturday
High: 75 °F
Sunny
Detailed Forecast
Today
Sunny, with a high near 57. North northeast wind around 5 mph.
Tonight
Clear, with a low around 31. Calm wind becoming west around 5 mph.
Wednesday
Sunny, with a high near 67. West wind 5 to 10 mph becoming south southwest in the afternoon.
Wednesday Night
Increasing clouds, with a low around 42. Southwest wind around 5 mph.
New Year's Day
Partly sunny, with a high near 73. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday Night
Partly cloudy, with a low around 55. South southwest wind 5 to 10 mph.
Friday
Sunny, with a high near 84. West wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
Clear, with a low around 52. West wind around 5 mph becoming north after midnight.
Saturday
Sunny, with a high near 75. North wind around 5 mph becoming east in the afternoon.
Saturday Night
Mostly clear, with a low around 50.
Sunday
Sunny, with a high near 79.
Sunday Night
Partly cloudy, with a low around 55.
Monday
Partly sunny, with a high near 76.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
San Marcos TX
29.88°N 97.94°W (Elev. 577 ft)
29.88°N 97.94°W (Elev. 577 ft)
5:42 am CST Dec 30, 2025
10am CST Dec 30, 2025-6pm CST Jan 5, 2026
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