Tracking Winter Weather and Frigid Temperatures This Weekend
Another clipper will drop into the Northern Plains and Upper Midwest into Sunday with snow and gusty winds contributing to some areas of blizzard conditions and snow squalls. Impactful snowfall will occur up and down the East Coast Sunday extending from the western Florida Panhandle to Maine. Read More >
Current conditions at
San Marcos, San Marcos Municipal Airport (KHYI)
Lat: 29.89°NLon: 97.86°WElev: 597ft.
Fair
43°F
6°C
| Humidity | 38% |
| Wind Speed | W 5 mph |
| Barometer | 30.44 in (1031.0 mb) |
| Dewpoint | 19°F (-7°C) |
| Visibility | 10.00 mi |
| Wind Chill | 40°F (4°C) |
| Last update | 18 Jan 9:56 am CST |
Extended Forecast for
San Marcos Municipal Airport TX
Today
High: 61 °F
Sunny
Tonight
Low: 30 °F
Clear
M.L.King Day
High: 66 °F
Sunny
Monday Night
Low: 41 °F
Increasing
CloudsTuesday
High: 58 °F
Cloudy
Tuesday Night
Low: 50 °F
Chance
ShowersWednesday
High: 64 °F
Chance
ShowersWednesday Night
Low: 48 °F
Mostly Cloudy
Thursday
High: 64 °F
Partly Sunny
Detailed Forecast
Today
Sunny, with a high near 61. Southwest wind 5 to 10 mph.
Tonight
Clear, with a low around 30. South southwest wind around 5 mph becoming calm after midnight.
M.L.King Day
Sunny, with a high near 66. Calm wind becoming southeast around 5 mph in the afternoon.
Monday Night
Increasing clouds, with a low around 41. Northeast wind 5 to 10 mph.
Tuesday
Cloudy, with a high near 58. North northeast wind 5 to 10 mph becoming east southeast in the afternoon.
Tuesday Night
A 30 percent chance of showers, mainly after midnight. Cloudy, with a low around 50. Southeast wind around 5 mph.
Wednesday
A 40 percent chance of showers, mainly before noon. Mostly cloudy, with a high near 64. Southeast wind around 5 mph.
Wednesday Night
Mostly cloudy, with a low around 48. East southeast wind around 5 mph becoming north northeast after midnight.
Thursday
Partly sunny, with a high near 64. North northeast wind around 5 mph.
Thursday Night
Mostly cloudy, with a low around 46.
Friday
Partly sunny, with a high near 68.
Friday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 52.
Saturday
A 20 percent chance of showers. Mostly cloudy, with a high near 67.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
San Marcos Municipal Airport TX
29.88°N 97.89°W (Elev. 597 ft)
29.88°N 97.89°W (Elev. 597 ft)
11:44 am CST Jan 18, 2026
11am CST Jan 18, 2026-6pm CST Jan 24, 2026
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