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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: 6:26 pm CST Nov 20, 2025 Latitude: 29.8832749 Longitude: -97.9413941 View on Google Maps

MouseOver for Detail Forecast
Tonight Friday Saturday Sunday Monday Tuesday Wednesday Thanksgiving Day
50% chance of thunderstorms on Tonight 40% chance of thunderstorms on Friday 30% chance of thunderstorms on Saturday 40% chance of thunderstorms on Sunday 70% chance of thunderstorms on Monday Sunny on Tuesday Mostly Sunny on Wednesday Sunny on Thanksgiving Day
Low: 67°F High: 80°F High: 76°F High: 77°F High: 77°F High: 77°F High: 66°F High: 65°F
Low: 63°F Low: 61°F Low: 65°F Low: 52°F Low: 51°F Low: 43°F  
Thunderstorms Thunderstorms Thunderstorms Thunderstorms Thunderstorms Sunny Mostly Sunny Sunny
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Current Conditions at
SAN MARCOS - (KHYI)
75°
Mostly Cloudy
Thunderstorm In Vicinity
as of 6:35 PM CST
Rel. Humidity: 78%
Dew Point: 68°F
Visibility: 10 Miles
Pressure: 29.89 in.
Flight Rule: VFR
Wind Data
10 MPH
310° Northwest
Cloud Level(s): Broken at 5000ft
Current Conditions at
NEW BRAUNFELS - (KBAZ)
81°
Clear
Thunderstorm In Vicinity
as of 6:38 PM CST
Rel. Humidity: 57%
Dew Point: 64°F
Visibility: 10 Miles
Pressure: 29.85 in.
Flight Rule: VFR
Wind Data
17 MPH
Gust: 26 MPH
160° South
Cloud Level(s): Clear
Current Conditions at
AUSTIN/BERGSTROM - (KAUS)
75°
Cloudy
Rain
as of 5:53 PM CST
Rel. Humidity: 78%
Dew Point: 68°F
Visibility: 9 Miles
Pressure: 29.89 in.
Flight Rule: VFR
Wind Data
15 MPH
Gust: 21 MPH
300° Northwest
Cloud Level(s): Broken at 4900ft, Broken at 6500ft, Solid Overcast at 10000ft
Current Conditions at
RANDOLPH AFB - (KRND)
82°
Mostly Clear
as of 5:55 PM CST
Rel. Humidity: 54%
Dew Point: 64°F
Visibility: 10 Miles
Pressure: 29.85 in.
Flight Rule: VFR
Wind Data
14 MPH
140° Southeast
Cloud Level(s): Few at 14000ft, Few at 19000ft
50% chance of thunderstorms Tonight Tonight... A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67. Southeast wind 5 to 10 mph. New rainfall amounts between a quarter and half of an inch possible.
40% chance of thunderstorms Friday Friday... A chance of showers and thunderstorms before noon, then a slight chance of showers between noon and 3pm. Cloudy, then gradually becoming mostly sunny, with a high near 80. Southwest wind around 5 mph becoming north in the afternoon. Chance of precipitation is 40%.
30% chance of thunderstorms Friday Night Friday Night... A slight chance of showers, then a chance of showers and thunderstorms after midnight. Partly cloudy, with a low around 63. Calm wind becoming north around 5 mph after midnight. Chance of precipitation is 30%.
30% chance of thunderstorms Saturday Saturday... A chance of showers and thunderstorms. Partly sunny, with a high near 76. Northeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
20% chance of rain Saturday Night Saturday Night... A 20 percent chance of showers. Mostly cloudy, with a low around 61. Northeast wind around 5 mph.
40% chance of thunderstorms Sunday Sunday... A chance of showers, with thunderstorms also possible after noon. Mostly cloudy, with a high near 77. East northeast wind 5 to 10 mph becoming south southeast in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 40%.
40% chance of thunderstorms Sunday Night Sunday Night... A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65. South wind around 10 mph, with gusts as high as 20 mph.
70% chance of thunderstorms Monday Monday... Showers likely and possibly a thunderstorm before noon, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 77. South wind 5 to 10 mph becoming west northwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 70%.
Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 52. West wind around 5 mph becoming calm.
Sunny on Tuesday Tuesday... Sunny, with a high near 77.
Cloudy on Tuesday Night Tuesday Night... Partly cloudy, with a low around 51.
Mostly Sunny on Wednesday Wednesday... Mostly sunny, with a high near 66.
Mostly Clear on Wednesday Night Wednesday Night... Mostly clear, with a low around 43.
Sunny on Thanksgiving Day Thanksgiving Day... Sunny, with a high near 65.
Current Radar Image


Sun Almanac for San Marcos, Texas
Sunrise: 07:01 AM
Sunset: 5:34 PM
Civil Sunrise:06:36 AM
Civil Sunset: 5:59 PM
Nautical Sunrise: 06:07 AM
Nautical Sunset: 6:28 PM
Astro Sunrise: 05:38 AM
Astro Sunset: 6:57 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.