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Current conditions at
San Marcos, San Marcos Municipal Airport (KHYI)
Lat: 29.89°NLon: 97.86°WElev: 597ft.
Fair
78°F
26°C
| Humidity | 79% |
| Wind Speed | S 3 mph |
| Barometer | 30.01 in (1015.3 mb) |
| Dewpoint | 71°F (22°C) |
| Visibility | 10.00 mi |
| Heat Index | 80°F (27°C) |
| Last update | 28 Aug 2:56 am CDT |
Extended Forecast for
3 Miles ESE Wimberley TX
Overnight

Low: 75 °F
Partly Cloudy
Friday
High: 97 °F
Mostly Sunny
then Slight
Chance
T-stormsFriday Night
Low: 74 °F
Slight Chance
T-storms then
Mostly ClearSaturday

High: 97 °F
Sunny
Saturday Night

Low: 73 °F
Mostly Clear
Sunday

High: 97 °F
Sunny
Sunday Night

Low: 74 °F
Mostly Clear
Monday

High: 97 °F
Sunny
Monday Night

Low: 74 °F
Mostly Clear
Detailed Forecast
Overnight
Partly cloudy, with a low around 75. Calm wind.
Friday
A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 97. Heat index values as high as 106. Calm wind becoming east southeast around 5 mph in the afternoon. Chance of precipitation is 20%.
Friday Night
A slight chance of thunderstorms before 7pm. Mostly clear, with a low around 74. East southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 10%.
Saturday
Sunny, with a high near 97. Heat index values as high as 104. Calm wind becoming south southeast around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 73. Southeast wind around 5 mph becoming south southwest after midnight.
Sunday
Sunny, with a high near 97. Calm wind becoming south around 5 mph in the morning.
Sunday Night
Mostly clear, with a low around 74. Southeast wind 5 to 10 mph.
Monday
Sunny, with a high near 97. South southeast wind around 5 mph.
Monday Night
Mostly clear, with a low around 74. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday
Mostly sunny, with a high near 97.
Tuesday Night
Mostly clear, with a low around 74.
Wednesday
Sunny, with a high near 97.
Wednesday Night
Mostly clear, with a low around 74.
Thursday
Mostly sunny, with a high near 98.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
3 Miles ESE Wimberley TX
29.97°N 98.05°W (Elev. 1050 ft)
29.97°N 98.05°W (Elev. 1050 ft)
2:42 am CDT Aug 28, 2026
3am CDT Aug 28, 2026-6pm CDT Sep 3, 2026


