Webinar on Heavy Rainfall and Flooding Threat for This Week - September 29, 2026

Watch our September 29, 2026, webinar regarding the heavy rainfall and flooding threat for South-Central Texas this week. A new webinar will be available around midday on Wednesday. Read More >

Hazardous Weather Conditions

Flood Watch in effect from September 30, 07:00 PM CDT until October 2, 07:00 PM CDT

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Overcast

84°F

29°C

Humidity	77%
Wind Speed	S 7 mph
Barometer	29.89 in (1011.3 mb)
Dewpoint	76°F (24°C)
Visibility	10.00 mi
Heat Index	93°F (34°C)
Last update	30 Sep 10:56 am CDT

More Information:

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

Extended Forecast for

Kyle TX

Flood Watch September 30, 07:00pm until October 2, 07:00pm

Click here for hazard details and duration

Flood Watch

Today
High: 95 °F
Chance
T-storms
Tonight
Low: 75 °F
Chance
T-storms then
Chance
Showers
Thursday
High: 90 °F
Showers
Likely then
T-storms
Thursday Night
Low: 71 °F
T-storms then
Heavy Rain
Friday
High: 83 °F
Showers
Friday Night
Low: 68 °F
Chance
T-storms then
Chance
Showers
Saturday
High: 81 °F
Chance
Showers
Saturday Night
Low: 68 °F
Slight Chance
T-storms then
Chance
Showers
Sunday
High: 81 °F
Chance
Showers

Detailed Forecast

Today

A 40 percent chance of showers and thunderstorms, mainly after 4pm. Partly sunny, with a high near 95. Heat index values as high as 105. South wind around 15 mph, with gusts as high as 25 mph.

Tonight

A 50 percent chance of showers and thunderstorms, mainly after 1am. Increasing clouds, with a low around 75. South southeast wind 10 to 15 mph, with gusts as high as 25 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Thursday

A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 10am. High near 90. South southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

Thursday Night

Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 71. South southeast wind around 5 mph becoming calm. Chance of precipitation is 90%.

Friday

Showers and possibly a thunderstorm. High near 83. East wind around 5 mph becoming north northeast in the afternoon. Chance of precipitation is 90%.

Friday Night

A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 68. North wind around 5 mph. Chance of precipitation is 50%.

Saturday

A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 81. North wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.

Saturday Night

A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 68. North wind 5 to 10 mph, with gusts as high as 20 mph.

Sunday

A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 81. North wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.

Sunday Night

A 20 percent chance of showers. Mostly cloudy, with a low around 67.

Monday

A 20 percent chance of showers. Mostly sunny, with a high near 80.

Monday Night

Partly cloudy, with a low around 64.

Tuesday

Mostly sunny, with a high near 81.