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
34°F
1°C
| Humidity | 82% |
| Wind Speed | NW 5 mph |
| Barometer | 30.28 in (1025.3 mb) |
| Dewpoint | 29°F (-2°C) |
| Visibility | 10.00 mi |
| Wind Chill | 29°F (-2°C) |
| Last update | 28 Jan 11:56 pm CST |
Extended Forecast for
5 Miles SW San Marcos TX
Overnight
Low: 31 °F
Partly Cloudy
Thursday
High: 68 °F
Mostly Sunny
Thursday Night
Low: 35 °F
Partly Cloudy
Friday
High: 57 °F
Partly Sunny
Friday Night
Low: 29 °F
Mostly Clear
Saturday
High: 45 °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. West 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 57. North wind 10 to 15 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 45. North northeast wind 10 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. West southwest wind around 5 mph.
Monday
Mostly sunny, with a high near 60.
Monday Night
Mostly cloudy, with a low around 49.
Tuesday
Mostly cloudy, with a high near 70.
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:
5 Miles SW San Marcos TX
29.81°N 97.99°W (Elev. 653 ft)
29.81°N 97.99°W (Elev. 653 ft)
11:46 pm CST Jan 28, 2026
12am CST Jan 29, 2026-6pm CST Feb 4, 2026
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