Current conditions at
San Marcos, San Marcos Municipal Airport (KHYI)
Lat: 29.89°NLon: 97.86°WElev: 597ft.
A Few Clouds and Breezy
88°F
31°C
| Humidity | 46% |
| Wind Speed | S 21 G 28 mph |
| Barometer | 29.82 in (1008.9 mb) |
| Dewpoint | 65°F (18°C) |
| Visibility | 10.00 mi |
| Heat Index | 90°F (32°C) |
| Last update | 17 Apr 3:56 pm CDT |
Extended Forecast for
5 Miles SW San Marcos TX
Tonight
Low: 65 °F
Mostly Cloudy
Saturday
High: 72 °F⇓
Chance
T-stormsSaturday Night
Low: 54 °F
Showers
LikelySunday
High: 73 °F
Partly Sunny
Sunday Night
Low: 55 °F
Mostly Cloudy
Monday
High: 67 °F
Chance
T-storms then
Showers
LikelyMonday Night
Low: 58 °F
Chance
T-stormsTuesday
High: 72 °F
Chance
T-stormsTuesday Night
Low: 64 °F
Mostly Cloudy
Detailed Forecast
Tonight
Mostly cloudy, with a low around 65. South southeast wind 10 to 20 mph, with gusts as high as 30 mph.
Saturday
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Cloudy, with a temperature rising to near 72 by 10am, then falling to around 61 during the remainder of the day. South wind 5 to 10 mph becoming north 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.
Saturday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Cloudy, with a low around 54. North northeast wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
Partly sunny, with a high near 73. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday Night
Mostly cloudy, with a low around 55. East northeast wind 5 to 10 mph becoming light in the evening.
Monday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 67. East wind around 5 mph. Chance of precipitation is 60%.
Monday Night
A 40 percent chance of showers and thunderstorms. Cloudy, with a low around 58. East wind around 5 mph.
Tuesday
A 50 percent chance of showers and thunderstorms. Cloudy, with a high near 72. East southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly cloudy, with a low around 64. East southeast wind 5 to 10 mph.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly cloudy, with a high near 82.
Wednesday Night
Mostly cloudy, with a low around 66.
Thursday
Mostly cloudy, with a high near 85.
Thursday Night
Mostly cloudy, with a low around 68.
Friday
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 85.
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)
2:44 pm CDT Apr 17, 2026
4pm CDT Apr 17, 2026-6pm CDT Apr 24, 2026
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