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

Marginal Risks of Severe Storms on the Central Plains; Flash flooding on the Northern Plains; Frost & Freeze Warnings in portions of the West & Northeast

A storm system developing across the Plains may cause locally severe weather in western Kansas and southwestern Nebraska today, with isolated flash flooding possible in portions of eastern Montana and western North Dakota. Frost and Freeze Warnings are in effect for portions of the central Rockies and central Appalachians tonight into Friday morning. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

61°F

16°C

Humidity 81%
Wind Speed Calm
Barometer 29.95 in (1013.7 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 16 Oct 7:56 am CDT
Extended Forecast for

3 Miles WSW San Marcos TX

  • Today

    Today: Mostly sunny, with a high near 87. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 87 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 64. Southeast wind around 5 mph becoming calm after midnight.

    Low: 64 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 91. Light southeast wind becoming south southeast 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 91 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 70. Southeast wind around 5 mph.

    Low: 70 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 94. South wind 5 to 10 mph.

    High: 94 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 67. South southeast wind around 5 mph.

    Low: 67 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 89. Northeast wind around 10 mph, with gusts as high as 25 mph.

    High: 89 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 64. Northeast wind around 5 mph becoming calm in the evening.

    Low: 64 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 91. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 91 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 87. Calm wind becoming southeast around 5 mph in the afternoon.
Tonight
Partly cloudy, with a low around 64. Southeast wind around 5 mph becoming calm after midnight.
Friday
Sunny, with a high near 91. Light southeast wind becoming south southeast 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Friday Night
Partly cloudy, with a low around 70. Southeast wind around 5 mph.
Saturday
Sunny, with a high near 94. South wind 5 to 10 mph.
Saturday Night
Mostly clear, with a low around 67. South southeast wind around 5 mph.
Sunday
Sunny, with a high near 89. Northeast wind around 10 mph, with gusts as high as 25 mph.
Sunday Night
Mostly clear, with a low around 64. Northeast wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 91. South wind 5 to 10 mph, with gusts as high as 20 mph.
Monday Night
Mostly clear, with a low around 69.
Tuesday
Mostly sunny, with a high near 89.
Tuesday Night
Mostly clear, with a low around 61.
Wednesday
Mostly sunny, with a high near 86.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW San Marcos TX
 29.86°N 97.97°W (Elev. 646 ft)
Last Update:
7:44 am CDT Oct 16, 2025
Forecast Valid:
8am CDT Oct 16, 2025-6pm CDT Oct 22, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation