Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89° N Lon: 97.86° W Elev: 597 ft.

Overcast

72°F

22°C

Humidity 87%
Wind Speed SE 7 mph
Barometer 30.15 in (1020.2 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 10 Apr 2:56 pm CDT
Detailed forecast for

Hays County

This Afternoon
Partly cloudy with a chance of showers and thunderstorms. Highs around 80. Southeast winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 50 percent.
Tonight
Mostly cloudy. A slight chance of showers and thunderstorms in the evening. Lows in the mid 60s. Southeast winds 5 to 10 mph. Chance of rain 20 percent.
Saturday
Patchy fog in the morning. Mostly cloudy with a chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Highs around 80. Southeast winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 50 percent.
Saturday Night
Cloudy with a chance of showers. A chance of thunderstorms, mainly in the evening. Patchy fog after midnight. Lows in the upper 60s. Southeast winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 50 percent.
Sunday
Patchy fog in the morning. Cloudy with a chance of thunderstorms. A chance of showers in the morning, then showers likely in the afternoon. Highs in the upper 70s. South winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 60 percent.
Sunday Night
Cloudy. A chance of showers and thunderstorms in the evening. Patchy fog. Lows in the upper 60s. Chance of rain 50 percent.
Monday
Mostly cloudy. Patchy fog in the morning. A slight chance of showers and thunderstorms in the afternoon. Highs in the lower 80s.
Monday Night
A slight chance of thunderstorms in the evening. Cloudy with a slight chance of showers. Lows in the upper 60s.
Tuesday
Mostly cloudy with a slight chance of showers and thunderstorms. Highs in the lower 80s.
Tuesday Night
Cloudy. Lows in the mid 60s.
Wednesday Through Thursday
Mostly cloudy with a slight chance of showers and thunderstorms. Highs in the mid 80s. Lows in the mid 60s.



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144 PM CDT Fri Apr 10 2026
 
 

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