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

A Couple of Fast Moving Storms Affecting Areas Along and East of the Rockies

A couple of storm systems will impact travel conditions through the first half of this weekend. Heavy snow from the mountains of the West will move into the upper Midwest and upper Great Lakes through tonight. Record warmth and Gulf moisture along and east of the Mississippi River will fuel severe thunderstorms, heavy rainfall, fog for the Tennessee Valley and deep South on Friday into Saturday. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

A Few Clouds

76°F

24°C

Humidity 67%
Wind Speed SW 15 mph
Barometer 29.80 in (1008.6 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 8 Jan 12:56 pm CST
Extended Forecast for

5 Miles SW San Marcos TX

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 80. West southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 80 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 59. West wind around 5 mph becoming calm in the evening.

    Low: 59 °F

    Mostly Cloudy

  • Friday

    Friday: A chance of showers and thunderstorms between 9am and 3pm, then a slight chance of showers. Mostly cloudy, with a high near 76. North wind 5 to 10 mph. Chance of precipitation is 40%.

    High: 76 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 45. North wind 5 to 10 mph increasing to 10 to 15 mph after midnight. Winds could gust as high as 30 mph.

    Low: 45 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 59. North wind 15 to 20 mph, with gusts as high as 35 mph.

    High: 59 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 38. North wind around 10 mph, with gusts as high as 20 mph.

    Low: 38 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 62. North northwest wind 5 to 10 mph becoming northeast in the afternoon. Winds could gust as high as 20 mph.

    High: 62 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 35. Northeast wind around 5 mph becoming calm in the evening.

    Low: 35 °F

    Mostly Cloudy

  • Monday

    Monday: A 20 percent chance of showers. Partly sunny, with a high near 60. North northeast wind around 5 mph becoming calm.

    High: 60 °F

    Slight Chance
    Showers

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 80. West southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Tonight
Mostly cloudy, with a low around 59. West wind around 5 mph becoming calm in the evening.
Friday
A chance of showers and thunderstorms between 9am and 3pm, then a slight chance of showers. Mostly cloudy, with a high near 76. North wind 5 to 10 mph. Chance of precipitation is 40%.
Friday Night
Mostly cloudy, with a low around 45. North wind 5 to 10 mph increasing to 10 to 15 mph after midnight. Winds could gust as high as 30 mph.
Saturday
Mostly sunny, with a high near 59. North wind 15 to 20 mph, with gusts as high as 35 mph.
Saturday Night
Mostly cloudy, with a low around 38. North wind around 10 mph, with gusts as high as 20 mph.
Sunday
Partly sunny, with a high near 62. North northwest wind 5 to 10 mph becoming northeast in the afternoon. Winds could gust as high as 20 mph.
Sunday Night
Mostly cloudy, with a low around 35. Northeast wind around 5 mph becoming calm in the evening.
Monday
A 20 percent chance of showers. Partly sunny, with a high near 60. North northeast wind around 5 mph becoming calm.
Monday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 41.
Tuesday
Partly sunny, with a high near 62.
Tuesday Night
Mostly clear, with a low around 43.
Wednesday
Sunny, with a high near 70.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SW San Marcos TX
 29.81°N 97.99°W (Elev. 653 ft)
Last Update:
12:48 pm CST Jan 8, 2026
Forecast Valid:
1pm CST Jan 8, 2026-6pm CST Jan 14, 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