Current conditions at
San Marcos, San Marcos Municipal Airport (KHYI)
Lat: 29.89°NLon: 97.86°WElev: 597ft.
Overcast
51°F
11°C
| Humidity | 83% |
| Wind Speed | N 16 G 24 mph |
| Barometer | 30.21 in (1022.7 mb) |
| Dewpoint | 46°F (8°C) |
| Visibility | 10.00 mi |
| Wind Chill | 46°F (8°C) |
| Last update | 18 Apr 8:56 pm CDT |
Extended Forecast for
4 Miles NNW San Marcos Municipal Airport TX
Tonight
Low: 51 °F
Showers
LikelySunday
High: 72 °F
Partly Sunny
Sunday Night
Low: 55 °F
Mostly Cloudy
then Slight
Chance
ShowersMonday
High: 65 °F
Showers
LikelyMonday Night
Low: 57 °F
Chance
Showers then
Chance
T-stormsTuesday
High: 70 °F
Showers
Tuesday Night
Low: 63 °F
Slight Chance
T-stormsWednesday
High: 81 °F
Chance
T-stormsWednesday Night
Low: 66 °F
Mostly Cloudy
Detailed Forecast
Tonight
Showers likely and possibly a thunderstorm before 1am, then a chance of showers between 1am and 4am. Mostly cloudy, with a low around 51. North northeast wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
Partly sunny, with a high near 72. East northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 55. East wind around 5 mph becoming calm in the evening.
Monday
Showers likely and possibly a thunderstorm. Cloudy, with a high near 65. East wind around 5 mph. Chance of precipitation is 60%.
Monday Night
A 50 percent chance of showers and thunderstorms. Cloudy, with a low around 57. East wind around 5 mph becoming calm in the evening.
Tuesday
Showers and possibly a thunderstorm. High near 70. East wind 5 to 10 mph. Chance of precipitation is 80%.
Tuesday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 63. Southeast wind 5 to 10 mph.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly cloudy, with a high near 81. Southeast wind 5 to 10 mph.
Wednesday Night
Mostly cloudy, with a low around 66. South southeast wind around 10 mph.
Thursday
Mostly cloudy, with a high near 84.
Thursday Night
Mostly cloudy, with a low around 68.
Friday
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 86.
Friday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.
Saturday
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 83.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
4 Miles NNW San Marcos Municipal Airport TX
29.95°N 97.89°W (Elev. 646 ft)
29.95°N 97.89°W (Elev. 646 ft)
6:46 pm CDT Apr 18, 2026
9pm CDT Apr 18, 2026-6pm CDT Apr 25, 2026
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