Current conditions at
San Marcos, San Marcos Municipal Airport (KHYI)
Lat: 29.89°NLon: 97.86°WElev: 597ft.
Mostly Cloudy
88°F
31°C
| Humidity | 48% |
| Wind Speed | S 20 mph |
| Barometer | 29.85 in (1010.1 mb) |
| Dewpoint | 66°F (19°C) |
| Visibility | 10.00 mi |
| Heat Index | 90°F (32°C) |
| Last update | 17 Apr 2:56 pm CDT |
Extended Forecast for
3 Miles WNW San Marcos TX
This Afternoon

High: 88 °F
Partly Sunny
Tonight

Low: 65 °F
Mostly Cloudy
Saturday
High: 71 °F⇓
Slight Chance
T-storms then
Chance
T-stormsSaturday Night

Low: 53 °F
Showers
LikelySunday

High: 72 °F
Partly Sunny
Sunday Night

Low: 54 °F
Mostly Cloudy
Monday
High: 66 °F
Chance
Showers then
Chance
T-stormsMonday Night

Low: 58 °F
Chance
T-stormsTuesday

High: 71 °F
Chance
T-storms
Detailed Forecast
This Afternoon
Partly sunny, with a high near 88. South wind around 15 mph, with gusts as high as 30 mph.
Tonight
Mostly cloudy, with a low around 65. South southeast wind 5 to 15 mph, with gusts as high as 25 mph.
Saturday
A 50 percent chance of showers and thunderstorms, mainly after 1pm. Cloudy, with a temperature rising to near 71 by 9am, then falling to around 61 during the remainder of the day. South southwest wind 5 to 10 mph becoming north 10 to 15 mph in the afternoon. Winds could gust as high as 30 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
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 53. North northeast wind around 15 mph, with gusts as high as 35 mph. Chance of precipitation is 70%.
Sunday
Partly sunny, with a high near 72. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday Night
Mostly cloudy, with a low around 54. East northeast wind around 5 mph becoming calm in the evening.
Monday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 66. East wind around 5 mph.
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 71. East southeast wind 5 to 10 mph.
Tuesday Night
Mostly cloudy, with a low around 63.
Wednesday
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 81.
Wednesday Night
Mostly cloudy, with a low around 66.
Thursday
Mostly cloudy, with a high near 84.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
3 Miles WNW San Marcos TX
29.9°N 97.97°W (Elev. 686 ft)
29.9°N 97.97°W (Elev. 686 ft)
2:44 pm CDT Apr 17, 2026
3pm CDT Apr 17, 2026-6pm CDT Apr 23, 2026


