Heavy Rainfall and Flooding Concerns in the Southeast; Unsettled Weather in the West

Heavy to excessive rainfall will persist across much of the Southeast U.S. over the next several days, with isolated flash flooding possible. The heaviest rainfall is forecast over the east coast of Florida. Showers and thunderstorms will continue in the Pacific Northwest and Intermountain West through the weekend. Snow could mix with rain in the highest elevations. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

91°F

33°C

Humidity	30%
Wind Speed	E 8 mph
Barometer	30.04 in (1016.3 mb)
Dewpoint	55°F (13°C)
Visibility	10.00 mi
Heat Index	89°F (32°C)
Last update	2 Oct 6:56 pm CDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

San Marcos TX

Tonight
Low: 68 °F
Mostly Clear
Friday
High: 92 °F
Sunny then
Slight Chance
Showers
Friday Night
Low: 66 °F
Mostly Clear
Saturday
High: 91 °F
Sunny
Saturday Night
Low: 67 °F
Mostly Clear
Sunday
High: 92 °F
Sunny
Sunday Night
Low: 69 °F
Mostly Clear
Monday
High: 92 °F
Sunny
Monday Night
Low: 70 °F
Mostly Clear

Detailed Forecast

Tonight

Mostly clear, with a low around 68. East wind around 5 mph becoming calm.

Friday

A 10 percent chance of showers after 4pm. Sunny, with a high near 92. Calm wind becoming east around 5 mph in the afternoon.

Friday Night

Mostly clear, with a low around 66. East wind around 5 mph becoming calm in the evening.

Saturday

Sunny, with a high near 91. Calm wind becoming east around 5 mph in the morning.

Saturday Night

Mostly clear, with a low around 67. East southeast wind around 5 mph becoming calm after midnight.

Sunday

Sunny, with a high near 92. Calm wind becoming east around 5 mph in the morning.

Sunday Night

Mostly clear, with a low around 69. East southeast wind around 5 mph becoming calm in the evening.

Monday

Sunny, with a high near 92. Calm wind becoming east around 5 mph in the afternoon.

Monday Night

Mostly clear, with a low around 70. East southeast wind around 5 mph becoming calm in the evening.

Tuesday

Sunny, with a high near 93.

Tuesday Night

Mostly clear, with a low around 70.

Wednesday

A 20 percent chance of showers. Sunny, with a high near 93.

Wednesday Night

Partly cloudy, with a low around 68.

Thursday

Sunny, with a high near 90.

Additional Forecasts and Information

Zone Area Forecast for Hays County, TX

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ABOUT THIS FORECAST

Point Forecast:

San Marcos TX
29.88°N 97.94°W (Elev. 577 ft)

6:44 pm CDT Oct 2, 2025

Forecast Valid:

7pm CDT Oct 2, 2025-6pm CDT Oct 9, 2025

Forecast Discussion

Additional Resources

Radar & Satellite Image

Link to Local Radar Data

Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation