
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
56°F
13°C
| Humidity | 90% |
| Wind Speed | SW 3 mph |
| Barometer | 29.90 in (1012.2 mb) |
| Dewpoint | 53°F (12°C) |
| Visibility | 10.00 mi |
| Last update | 6 Dec 11:56 pm CST |
Extended Forecast for
San Marcos Municipal Airport TX
Overnight

Low: 52 °F
Patchy Fog
Sunday
High: 72 °F
Patchy Fog
then SunnySunday Night

Low: 39 °F
Clear
Monday

High: 62 °F
Sunny
Monday Night

Low: 36 °F
Clear
Tuesday

High: 67 °F
Sunny
Tuesday Night

Low: 47 °F
Mostly Clear
Wednesday

High: 77 °F
Sunny
Wednesday Night

Low: 50 °F
Mostly Clear
Detailed Forecast
Overnight
Patchy fog after 4am. Otherwise, partly cloudy, with a low around 52. Southwest wind around 5 mph.
Sunday
Patchy fog before 8am. Otherwise, sunny, with a high near 72. West southwest wind 5 to 10 mph becoming north 10 to 15 mph in the afternoon. Winds could gust as high as 30 mph.
Sunday Night
Clear, with a low around 39. North wind 10 to 15 mph, with gusts as high as 25 mph.
Monday
Sunny, with a high near 62. North wind 5 to 10 mph.
Monday Night
Clear, with a low around 36. East northeast wind around 5 mph becoming calm.
Tuesday
Sunny, with a high near 67. Light southwest wind becoming south southwest 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 47. South southwest wind 5 to 10 mph.
Wednesday
Sunny, with a high near 77. Southwest wind around 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 81.
Thursday Night
Mostly clear, with a low around 45.
Friday
Sunny, with a high near 62.
Friday Night
Mostly clear, with a low around 34.
Saturday
Sunny, with a high near 56.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
San Marcos Municipal Airport TX
29.9°N 97.89°W (Elev. 604 ft)
29.9°N 97.89°W (Elev. 604 ft)
12:42 am CST Dec 7, 2025
12am CST Dec 7, 2025-6pm CST Dec 13, 2025


