Current conditions at
San Marcos, San Marcos Municipal Airport (KHYI)
Lat: 29.89°NLon: 97.86°WElev: 597ft.
Overcast
72°F
22°C
| Humidity | 87% |
| Wind Speed | S 12 mph |
| Barometer | 29.99 in (1014.9 mb) |
| Dewpoint | 68°F (20°C) |
| Visibility | 10.00 mi |
| Last update | 9 Mar 11:56 pm CDT |
Extended Forecast for
San Marcos TX
Overnight
Low: 68 °F
Cloudy
Tuesday
High: 83 °F
Cloudy
Tuesday Night
Low: 64 °F
Slight Chance
T-storms then
ShowersWednesday
High: 80 °F
Chance
T-storms then
Chance
ShowersWednesday Night
Low: 50 °F
Mostly Clear
Thursday
High: 70 °F
Sunny
Thursday Night
Low: 46 °F
Clear
Friday
High: 80 °F
Sunny
Friday Night
Low: 54 °F
Clear
Detailed Forecast
Overnight
Cloudy, with a low around 68. South wind around 10 mph.
Tuesday
Cloudy, with a high near 83. South wind 10 to 15 mph, with gusts as high as 30 mph.
Tuesday Night
A slight chance of showers before 10pm, then a slight chance of showers and thunderstorms between 10pm and 1am, then showers and possibly a thunderstorm after 1am. Low around 64. South southeast wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
A 50 percent chance of showers and thunderstorms, mainly before 1pm. Cloudy through mid morning, then gradual clearing, with a high near 80. North northwest wind 5 to 10 mph becoming west southwest in the morning. Winds could gust as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 50. North wind around 15 mph, with gusts as high as 25 mph.
Thursday
Sunny, with a high near 70. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday Night
Clear, with a low around 46. East northeast wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 80. Light south southwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Friday Night
Clear, with a low around 54. South wind around 5 mph.
Saturday
Sunny, with a high near 85.
Saturday Night
Mostly clear, with a low around 60.
Sunday
Mostly sunny, with a high near 89.
Sunday Night
Partly cloudy, with a low around 55.
Monday
Partly sunny, with a high near 73.
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)
11:32 pm CDT Mar 9, 2026
12am CDT Mar 10, 2026-6pm CDT Mar 16, 2026
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