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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: 7:44 am CST Jan 23, 2026 Latitude: 29.8832749 Longitude: -97.9413941 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Saturday Sunday Monday Tuesday Wednesday Thursday
40% chance of thunderstorms on Today 90% chance of thunderstorms on Tonight 90% chance of thunderstorms on Saturday 20% chance of freezing rain on Sunday Sunny on Monday Mostly Sunny on Tuesday Mostly Sunny on Wednesday Mostly Sunny on Thursday
High: 71°F Low: 39°F High: 32 °F High: 32°F High: 37°F High: 50°F High: 53°F High: 51°F
Low: 22°F Low: 14°F Low: 18°F Low: 34°F Low: 27°F  
Thunderstorms Thunderstorms Thunderstorms Freezing Rain Sunny Mostly Sunny Mostly Sunny Mostly Sunny
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Current Conditions at
SAN MARCOS - (KHYI)
Cloudy
Fog
as of 7:03 AM CST
Visibility: 1/4 Miles
Pressure: 30.06 in.
Flight Rule: IFR
Wind Data
7 MPH
130° Southeast
Current Conditions at
NEW BRAUNFELS - (KBAZ)
61°
Cloudy
Mist
as of 7:30 AM CST
Rel. Humidity: 100%
Dew Point: 61°F
Visibility: 1 1/2 Miles
Pressure: 30.04 in.
Flight Rule: LIFR
Wind Data
9 MPH
120° Southeast
Cloud Level(s): Solid Overcast at 200ft
Current Conditions at
AUSTIN/BERGSTROM - (KAUS)
61°
Cloudy
Mist
as of 6:53 AM CST
Rel. Humidity: 100%
Dew Point: 61°F
Visibility: 1/4 Miles
Pressure: 30.05 in.
Flight Rule: LIFR
Wind Data
6 MPH
100° East
Cloud Level(s): Solid Overcast at 200ft
Current Conditions at
RANDOLPH AFB - (KRND)
63°
Mostly Cloudy
Fog
as of 7:05 AM CST
Rel. Humidity: 93%
Dew Point: 61°F
Visibility: 1/4 Miles
Pressure: 30.03 in.
Flight Rule: IFR
Wind Data
3 MPH
110° East
40% chance of thunderstorms Today Today... Areas of drizzle before 10am, then a chance of showers between 10am and 3pm, then a chance of showers and thunderstorms after 3pm. Widespread dense fog, mainly before 10am. Otherwise, cloudy, with a high near 71. East wind 5 to 10 mph. Chance of precipitation is 40%.

90% chance of thunderstorms Tonight Tonight... Showers and possibly a thunderstorm. Patchy fog between 8pm and 11pm. Low around 39. East wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

90% chance of thunderstorms Saturday Saturday... Showers and possibly a thunderstorm before noon, then a chance of showers and thunderstorms between noon and 3pm, then a chance of showers after 3pm. Temperature falling to around 32 by 5pm. North wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

80% chance of freezing rain Saturday Night Saturday Night... Rain or freezing rain before midnight, then freezing rain between midnight and 3am, then freezing rain and sleet after 3am. Some thunder is also possible. Low around 22. North wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%.

20% chance of freezing rain Sunday Sunday... A slight chance of freezing rain and sleet before 9am, then a slight chance of sleet between 9am and noon. Mostly sunny, with a high near 32. North wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.

Mostly Clear on Sunday Night Sunday Night... Mostly clear, with a low around 14. North wind 10 to 15 mph, with gusts as high as 25 mph.

Sunny on Monday Monday... Sunny, with a high near 37. North wind around 5 mph.

Clear on Monday Night Monday Night... Clear, with a low around 18. East northeast wind around 5 mph becoming calm.

Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 50. Calm wind becoming south around 5 mph in the morning.

Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 34.

Mostly Sunny on Wednesday Wednesday... Mostly sunny, with a high near 53.

Mostly Clear on Wednesday Night Wednesday Night... Mostly clear, with a low around 27.

Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 51.

Current Radar Image


Sun Almanac for San Marcos, Texas
Sunrise: 07:26 AM
Sunset: 6:01 PM
Civil Sunrise:07:01 AM
Civil Sunset: 6:27 PM
Nautical Sunrise: 06:32 AM
Nautical Sunset: 6:56 PM
Astro Sunrise: 06:03 AM
Astro Sunset: 7:24 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.