Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

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

Overcast

79°F

26°C

Humidity 65%
Wind Speed S 15 G 23 mph
Barometer 29.96 in (1013.7 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 15 Apr 12:56 pm CDT
Detailed forecast for

Hays County

This Afternoon
Mostly cloudy with a chance of showers and thunderstorms. Highs in the lower 80s. South winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 40 percent.
Tonight
Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly cloudy after midnight. Lows in the upper 60s. South winds 5 to 10 mph. Chance of rain 20 percent.
Thursday
Mostly cloudy in the morning, then becoming partly cloudy. Highs in the upper 80s. South winds 5 to 10 mph with gusts up to 20 mph.
Thursday Night
Mostly clear in the evening, then becoming mostly cloudy. Lows in the mid 60s. South winds around 10 mph with gusts up to 25 mph.
Friday
Mostly cloudy in the morning, then becoming partly cloudy. Highs in the upper 80s. South winds 10 to 15 mph with gusts up to 30 mph.
Friday Night
Mostly cloudy. Lows in the mid 60s.
Saturday
Cloudy with a chance of thunderstorms. A chance of showers in the morning, then showers likely in the afternoon. Cooler with highs in the mid 70s. Temperature falling to around 70 in the afternoon. Chance of rain 60 percent.
Saturday Night
Cloudy with a chance of showers. A chance of thunderstorms, mainly in the evening. Cooler with lows in the lower 50s. Chance of rain 50 percent.
Sunday
Mostly cloudy with a slight chance of showers. Highs in the upper 60s.
Sunday Night
Cloudy. A slight chance of showers in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. Lows in the mid 50s. Chance of rain 30 percent.
Monday
Cloudy with a chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Highs in the lower 60s. Chance of rain 50 percent.
Monday Night And Tuesday
Cloudy with a chance of showers with a slight chance of thunderstorms. Lows in the mid 50s. Highs in the lower 70s. Chance of rain 30 percent.



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139 PM CDT Wed Apr 15 2026
 
 

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