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San Marcos, Texas Weather Forecast
San Marcos, Texas Weather
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Weather Forecast for San Marcos, Texas : Hays County
Issued: 11:30 pm CST Dec 19, 2025 Latitude: 29.8832749 Longitude: -97.9413941 View on Google Maps

MouseOver for Detail Forecast
Tonight Saturday Sunday Monday Tuesday Wednesday Christmas Day Friday
Mostly Clear on Tonight Morning Fog on Saturday Morning Fog on Sunday Partly Sunny on Monday Mostly Cloudy on Tuesday Partly Sunny on Wednesday Partly Sunny on Christmas Day Partly Sunny on Friday
Low: 49°F High: 74°F High: 74°F High: 77°F High: 80°F High: 79°F High: 79°F High: 78°F
Low: 53°F Low: 54°F Low: 64°F Low: 62°F Low: 60°F Low: 61°F  
Mostly Clear Morning Fog Morning Fog Partly Sunny Mostly Cloudy Partly Sunny Partly Sunny Partly Sunny
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Current Conditions at
SAN MARCOS - (KHYI)
50°
Clear
as of 10:56 PM CST
Rel. Humidity: 76%
Dew Point: 43°F
Visibility: 10 Miles
Pressure: 30.08 in.
Flight Rule: VFR
Wind Data
8 MPH
190° South
Cloud Level(s): Clear
Current Conditions at
NEW BRAUNFELS - (KBAZ)
48°
Clear
as of 10:51 PM CST
Rel. Humidity: 76%
Dew Point: 41°F
Visibility: 10 Miles
Pressure: 30.06 in.
Flight Rule: VFR
Wind Data
8 MPH
200° South
Cloud Level(s): Clear
Current Conditions at
AUSTIN/BERGSTROM - (KAUS)
54°
Clear
as of 10:53 PM CST
Rel. Humidity: 71%
Dew Point: 45°F
Visibility: 10 Miles
Pressure: 30.05 in.
Flight Rule: VFR
Wind Data
13 MPH
190° South
Cloud Level(s): Clear
Current Conditions at
RANDOLPH AFB - (KRND)
52°
Clear
as of 10:55 PM CST
Rel. Humidity: 66%
Dew Point: 41°F
Visibility: 10 Miles
Pressure: 30.07 in.
Flight Rule: VFR
Wind Data
5 MPH
200° South
Cloud Level(s): Clear
Mostly Clear on Tonight Tonight... Mostly clear, with a low around 49. South southwest wind around 10 mph.

Morning Fog on Saturday Saturday... Patchy fog between 8am and 10am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 74. South southwest wind 10 to 15 mph, with gusts as high as 25 mph.

Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 53. South southwest wind around 5 mph becoming northwest after midnight.

Morning Fog on Sunday Sunday... Patchy fog between 7am and 8am. Otherwise, sunny, with a high near 74. Northwest wind around 5 mph becoming northeast in the afternoon.

Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around 54. Northeast wind around 5 mph becoming calm in the evening.

Partly Sunny on Monday Monday... Partly sunny, with a high near 77. Light and variable wind becoming south 5 to 10 mph in the morning.

Mostly Cloudy on Monday Night Monday Night... Mostly cloudy, with a low around 64. South wind 5 to 10 mph.

Mostly Cloudy on Tuesday Tuesday... Mostly cloudy, with a high near 80. South wind 5 to 10 mph, with gusts as high as 20 mph.

Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 62. South wind around 5 mph.

Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 79.

Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 60.

Partly Sunny on Christmas Day Christmas Day... Partly sunny, with a high near 79.

Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 61.

Partly Sunny on Friday Friday... Partly sunny, with a high near 78.

Current Radar Image


Sun Almanac for San Marcos, Texas
Sunrise: 07:23 AM
Sunset: 5:36 PM
Civil Sunrise:06:57 AM
Civil Sunset: 6:03 PM
Nautical Sunrise: 06:27 AM
Nautical Sunset: 6:32 PM
Astro Sunrise: 05:58 AM
Astro Sunset: 7:02 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.