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 | S 13 G 17 mph |
| Barometer | 30.03 in (1015.9 mb) |
| Dewpoint | 70°F (21°C) |
| Visibility | 10.00 mi |
| Heat Index | 105°F (41°C) |
| Last update | 8 Sep 1:56 pm CDT |
Extended Forecast for
Mountain City TX
This Afternoon
High: 99 °F
Slight Chance
T-stormsTonight
Low: 75 °F
Slight Chance
T-storms then
Mostly ClearWednesday
High: 99 °F
Mostly Sunny
then Slight
Chance
T-stormsWednesday Night
Low: 74 °F
Slight Chance
T-storms then
Partly CloudyThursday
High: 98 °F
Mostly Sunny
Thursday Night
Low: 74 °F
Partly Cloudy
Friday
High: 99 °F
Hot
Friday Night
Low: 75 °F
Mostly Clear
Saturday
High: 100 °F
Hot
Detailed Forecast
This Afternoon
A 20 percent chance of showers and thunderstorms after 4pm. Sunny and hot, with a high near 99. Heat index values as high as 105. South southeast wind around 5 mph.
Tonight
A 20 percent chance of showers and thunderstorms before 10pm. Mostly clear, with a low around 75. South wind 5 to 10 mph.
Wednesday
A 20 percent chance of showers and thunderstorms after 4pm. Mostly sunny and hot, with a high near 99. Heat index values as high as 105. Calm wind becoming south southeast around 5 mph in the afternoon.
Wednesday Night
A 20 percent chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 74. Southeast wind around 5 mph becoming calm after midnight.
Thursday
Mostly sunny, with a high near 98. Calm wind becoming south southwest around 5 mph.
Thursday Night
Partly cloudy, with a low around 74. Southeast wind around 5 mph becoming south southwest after midnight.
Friday
Sunny and hot, with a high near 99. Calm wind becoming south around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 75. South southeast wind 5 to 10 mph.
Saturday
Sunny and hot, with a high near 100. South wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday Night
Mostly clear, with a low around 75.
Sunday
Mostly sunny and hot, with a high near 99.
Sunday Night
Partly cloudy, with a low around 75.
Monday
Mostly sunny, with a high near 98.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Mountain City TX
30.04°N 97.89°W (Elev. 837 ft)
30.04°N 97.89°W (Elev. 837 ft)
1:28 pm CDT Sep 8, 2026
2pm CDT Sep 8, 2026-6pm CDT Sep 14, 2026
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