National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Partly Cloudy

70°F

21°C

Humidity 93%
Wind Speed SE 5 mph
Barometer 30.03 in (1016.3 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 12 Oct 1:56 am CDT
Extended Forecast for

3 Miles ESE Maxwell TX

  • Overnight

    Overnight: Mostly cloudy, with a low around 70. Southeast wind around 5 mph.

    Low: 70 °F

    Mostly Cloudy

  • Columbus Day

    Columbus Day: A slight chance of showers between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 93. Heat index values as high as 101. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    High: 93 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 74. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 74 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 95. Heat index values as high as 105. South wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 95 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 10 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 75. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 75 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 93. South southeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.

    High: 93 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 69. South southeast wind 5 to 15 mph, with gusts as high as 25 mph.

    Low: 69 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 90. Southeast wind 5 to 10 mph.

    High: 90 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 65. Light and variable wind becoming north 5 to 10 mph after midnight.

    Low: 65 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 70. Southeast wind around 5 mph.
Columbus Day
A slight chance of showers between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 93. Heat index values as high as 101. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Monday Night
Mostly cloudy, with a low around 74. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday
A 20 percent chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 95. Heat index values as high as 105. South wind 5 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
A 10 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 75. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 93. South southeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
Wednesday Night
Partly cloudy, with a low around 69. South southeast wind 5 to 15 mph, with gusts as high as 25 mph.
Thursday
Mostly sunny, with a high near 90. Southeast wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 65. Light and variable wind becoming north 5 to 10 mph after midnight.
Friday
Mostly sunny, with a high near 81. Breezy.
Friday Night
Mostly cloudy, with a low around 58. Breezy.
Saturday
Mostly sunny, with a high near 75.
Saturday Night
Partly cloudy, with a low around 54.
Sunday
Mostly sunny, with a high near 78.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ESE Maxwell TX
 29.86°N 97.78°W (Elev. 617 ft)
Last Update:
1:24 am CDT Oct 12, 2026
Forecast Valid:
2am CDT Oct 12, 2026-6pm CDT Oct 18, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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