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Current conditions at
San Marcos, San Marcos Municipal Airport (KHYI)
Lat: 29.89°NLon: 97.86°WElev: 597ft.
Fair
98°F
37°C
| Humidity | 40% |
| Wind Speed | Vrbl 3 mph |
| Barometer | 30.04 in (1016.1 mb) |
| Dewpoint | 70°F (21°C) |
| Visibility | 10.00 mi |
| Heat Index | 105°F (41°C) |
| Last update | 28 Aug 1:56 pm CDT |
Extended Forecast for
5 Miles NNE Prairie Lea TX
This Afternoon

High: 99 °F
Chance
T-stormsTonight
Low: 75 °F
Chance
T-storms then
Slight Chance
ShowersSaturday

High: 99 °F
Hot
Saturday Night

Low: 75 °F
Mostly Clear
Sunday

High: 100 °F
Hot
Sunday Night

Low: 75 °F
Mostly Clear
Monday

High: 100 °F
Hot
Monday Night

Low: 75 °F
Mostly Clear
Tuesday

High: 100 °F
Hot
Detailed Forecast
This Afternoon
A 30 percent chance of showers and thunderstorms, mainly after 4pm. Sunny and hot, with a high near 99. Heat index values as high as 107. Calm wind becoming east around 5 mph.
Tonight
A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly clear, with a low around 75. East southeast wind 5 to 10 mph becoming light and variable in the evening. Chance of precipitation is 30%.
Saturday
Sunny and hot, with a high near 99. Heat index values as high as 104. Calm wind becoming southeast around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 75. South wind 5 to 10 mph.
Sunday
Sunny and hot, with a high near 100. Calm wind becoming south southeast around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 75. South wind 5 to 10 mph.
Monday
Sunny and hot, with a high near 100. Calm wind becoming south southeast around 5 mph in the morning.
Monday Night
Mostly clear, with a low around 75. Southeast wind 5 to 10 mph.
Tuesday
Mostly sunny and hot, with a high near 100. Calm wind becoming south southeast around 5 mph in the morning.
Tuesday Night
Mostly clear, with a low around 75.
Wednesday
Mostly sunny and hot, with a high near 100.
Wednesday Night
Mostly clear, with a low around 75.
Thursday
Mostly sunny and hot, with a high near 100.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
5 Miles NNE Prairie Lea TX
29.77°N 97.67°W (Elev. 404 ft)
29.77°N 97.67°W (Elev. 404 ft)
1:24 pm CDT Aug 28, 2026
2pm CDT Aug 28, 2026-6pm CDT Sep 3, 2026


