Prolonged Extreme Cold; Eastern U.S. Winter Storm
Another Arctic blast will surge south across the northern Plains Thursday night, crossing the Midwest and reaching the Gulf Coast Friday night. Confidence continues to increase for significant heavy snow across much of the Southern Appalachians, Carolinas, and southern Mid-Atlantic Friday into Sunday. Read More >
Current conditions at
San Marcos, San Marcos Municipal Airport (KHYI)
Lat: 29.89°NLon: 97.86°WElev: 597ft.
Fair
30°F
-1°C
| Humidity | 88% |
| Wind Speed | NW 5 mph |
| Barometer | 30.22 in (1023.3 mb) |
| Dewpoint | 27°F (-3°C) |
| Visibility | 10.00 mi |
| Wind Chill | 25°F (-4°C) |
| Last update | 29 Jan 2:56 am CST |
Extended Forecast for
San Marcos TX
Overnight
Low: 31 °F
Partly Cloudy
Thursday
High: 68 °F
Mostly Sunny
Thursday Night
Low: 35 °F
Partly Cloudy
Friday
High: 56 °F
Partly Sunny
Friday Night
Low: 29 °F
Mostly Clear
Saturday
High: 44 °F
Sunny
Saturday Night
Low: 21 °F
Mostly Clear
Sunday
High: 53 °F
Sunny
Sunday Night
Low: 33 °F
Mostly Clear
Detailed Forecast
Overnight
Partly cloudy, with a low around 31. Calm wind.
Thursday
Mostly sunny, with a high near 68. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday Night
Partly cloudy, with a low around 35. North wind 10 to 15 mph, with gusts as high as 20 mph.
Friday
Partly sunny, with a high near 56. North wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
Mostly clear, with a low around 29. North wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday
Sunny, with a high near 44. North northeast wind 5 to 15 mph, with gusts as high as 25 mph.
Saturday Night
Mostly clear, with a low around 21. Northeast wind around 5 mph becoming calm in the evening.
Sunday
Sunny, with a high near 53. Calm wind becoming south around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 33. South wind around 5 mph becoming west after midnight.
Monday
Mostly sunny, with a high near 60.
Monday Night
Mostly cloudy, with a low around 49.
Tuesday
Mostly cloudy, with a high near 69.
Tuesday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 50.
Wednesday
A 40 percent chance of showers. Mostly cloudy, with a high near 61.
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)
2:52 am CST Jan 29, 2026
3am CST Jan 29, 2026-6pm CST Feb 4, 2026
Additional Resources
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