Heavy Lake Effect Snow; Subfreezing Temperatures in the Eastern U.S.
A multi-day heavy lake effect snow event is expected downwind of Lakes Erie and Ontario through New Year's Day. The Arctic front will continue to bring increasing winds to the Northeast that will remain gusty. Subfreezing overnight low temperatures will be found as far south as the Gulf Coast. Read More >
Current conditions at
San Marcos, San Marcos Municipal Airport (KHYI)
Lat: 29.89°NLon: 97.86°WElev: 597ft.
Overcast
46°F
8°C
| Humidity | 33% |
| Wind Speed | N 17 mph |
| Barometer | 30.51 in (1033.4 mb) |
| Dewpoint | 18°F (-8°C) |
| Visibility | 10.00 mi |
| Wind Chill | 39°F (4°C) |
| Last update | 30 Dec 1:56 am CST |
Extended Forecast for
5 Miles SW San Marcos TX
Overnight
Low: 38 °F
Mostly Cloudy
Tuesday
High: 58 °F
Sunny
Tuesday Night
Low: 32 °F
Clear
Wednesday
High: 66 °F
Sunny
Wednesday Night
Low: 41 °F
Partly Cloudy
New 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
Detailed Forecast
Overnight
Mostly cloudy, with a low around 38. North wind around 10 mph.
Tuesday
Sunny, with a high near 58. North northeast wind 5 to 10 mph.
Tuesday Night
Clear, with a low around 32. Calm wind becoming west around 5 mph.
Wednesday
Sunny, with a high near 66. Southwest wind 5 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 41. 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 around 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.
Saturday Night
Mostly clear, with a low around 49.
Sunday
Sunny, with a high near 79.
Sunday Night
Partly cloudy, with a low around 55.
Monday
Partly sunny, with a high near 77.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
5 Miles SW San Marcos TX
29.81°N 97.99°W (Elev. 653 ft)
29.81°N 97.99°W (Elev. 653 ft)
12:46 am CST Dec 30, 2025
2am CST Dec 30, 2025-6pm CST Jan 5, 2026
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