
Tracking Weekend Storm Impacts
A storm and trailing cold front will continue to slowly move through the Gulf Coast and Southeast U.S. through this weekend with widespread rain showers and isolated thunderstorms. A fast-moving clipper storm may bring several inches of snow to the north-central Plains, Midwest, eastern Great Lakes, and Northeast regions this weekend. Read More >
Current conditions at
San Marcos, San Marcos Municipal Airport (KHYI)
Lat: 29.89°NLon: 97.86°WElev: 597ft.
Fair
66°F
19°C
| Humidity | 56% |
| Wind Speed | S 7 mph |
| Barometer | 29.84 in (1010.1 mb) |
| Dewpoint | 50°F (10°C) |
| Visibility | 10.00 mi |
| Last update | 6 Dec 5:56 pm CST |
Extended Forecast for
San Marcos TX
Tonight
Low: 54 °F
Clear then
Patchy FogSunday
High: 72 °F
Patchy Fog
then SunnySunday Night

Low: 41 °F
Clear
Monday

High: 62 °F
Sunny
Monday Night

Low: 37 °F
Clear
Tuesday

High: 67 °F
Sunny
Tuesday Night

Low: 49 °F
Clear
Wednesday

High: 77 °F
Sunny
Wednesday Night

Low: 50 °F
Mostly Clear
Detailed Forecast
Tonight
Patchy fog after 4am. Otherwise, mostly clear, with a low around 54. South southwest wind around 5 mph.
Sunday
Patchy fog before 8am. Otherwise, sunny, with a high near 72. West southwest wind 5 to 15 mph becoming north in the afternoon. Winds could gust as high as 25 mph.
Sunday Night
Clear, with a low around 41. North wind around 10 mph, with gusts as high as 25 mph.
Monday
Sunny, with a high near 62. North wind 5 to 10 mph becoming east northeast in the afternoon.
Monday Night
Clear, with a low around 37. East wind around 5 mph becoming calm.
Tuesday
Sunny, with a high near 67. Light south southwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Tuesday Night
Clear, with a low around 49. South southwest wind 5 to 10 mph.
Wednesday
Sunny, with a high near 77. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 50. West southwest wind around 5 mph.
Thursday
Sunny, with a high near 78.
Thursday Night
Mostly clear, with a low around 48.
Friday
Mostly sunny, with a high near 66.
Friday Night
Partly cloudy, with a low around 43.
Saturday
Mostly sunny, with a high near 62.
Additional Forecasts and Information
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ABOUT 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)
5:51 pm CST Dec 6, 2025
6pm CST Dec 6, 2025-6pm CST Dec 13, 2025


