What is today's weather forecast for San Marcos, TX?

Today's forecast for San Marcos shows a high of 81 degrees and a low of 67 degrees Fahrenheit. A chance of showers, with thunderstorms also possible after 3pm.

What is the 7-day weather forecast for San Marcos, TX?

The 7-day forecast for San Marcos shows highs from 70 to 81 degrees and lows from 52 to 67 degrees Fahrenheit. Expect precipitation on 5 days with chances of 20% or higher.

Will it rain in San Marcos, TX this week?

Yes, rain is possible in San Marcos this week. Precipitation chances: Thursday (60% chance), Friday (50% chance), Saturday (40% chance), Sunday (50% chance), Monday (70% chance).

How accurate is the San Marcos weather forecast?

WeatherForYou provides highly accurate San Marcos forecasts using National Weather Service data and current conditions from the nearest available weather stations, often miles closer than regional airports, for the most precise local forecasts.

San Marcos, TX Weather Forecast and Current Conditions

WEATHER ALERTS - Flood Watch

Current Conditions From Nearby Local Station

Switch to Metric Units

78°F
Feels Like 78°F

Humidity 77% Dew Point 70°F Wind NNE 3 MPH Gusts 8 Barometer 30 in.762 mm

Solar Rad 227 w/m²

Report from a MADIS/MESONET weather station 0.9 miles NE of central San Marcos
at 10:45 AM Thu, Nov 20, 2025

Point Forecast at a Glance

ThuNov 20

50%

FriNov 21

50%

SatNov 22

30%

SunNov 23

50%

MonNov 24

70%

TueNov 25

WedNov 26

7-Day Temperature Trend

Week Ahead Summary

Cooling trend continues with high temperatures dropping from 81°F to 70°F. Unsettled weather expected with rain likely on at least 5 days.

Climate Context

This week's forecast shows temperatures running 6°F above the historical average for November. Normal highs for this period are around 71°F with lows around 48°F.

This Date in Weather History

1869 - A second great windstorm in three days struck Vermont and New York blowing railroad trains off their tracks.

San Marcos, TX 7 Day Weather Forecast Details

Thursday Nov 20

Day: A chance of showers, with thunderstorms also possible after 3pm. Mostly cloudy, with a high near 81. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.

Night: Showers likely and possibly a thunderstorm before 9pm, then a chance of showers and thunderstorms after 9pm. Increasing clouds, with a low around 67. South southeast wind 5 to 10 mph becoming northeast in the evening. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.

Friday Nov 21

Day: A chance of showers and thunderstorms before noon, then a slight chance of showers. Cloudy, then gradually becoming mostly sunny, with a high near 80. South southwest wind around 5 mph becoming north in the afternoon. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Night: A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight, then a chance of showers and thunderstorms after midnight. Increasing clouds, with a low around 63. Calm wind becoming north around 5 mph after midnight. Chance of precipitation is 30%.

Saturday Nov 22

Day: A 30 percent chance of showers. Partly sunny, with a high near 78. East northeast wind 5 to 10 mph, with gusts as high as 20 mph.

Night: A 40 percent chance of showers. Mostly cloudy, with a low around 64. East northeast wind around 5 mph.

Sunday Nov 23

Day: A chance of showers, with thunderstorms also possible after noon. Mostly cloudy, with a high near 78. South southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.

Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63. South southeast wind around 10 mph, with gusts as high as 20 mph.

Monday Nov 24

Day: Showers likely and possibly a thunderstorm before noon, then a chance of showers. Partly sunny, with a high near 74. South southwest wind 5 to 10 mph becoming north northwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 70%.

Night: A 20 percent chance of showers before midnight. Mostly clear, with a low around 52.

Tuesday Nov 25

Day: Sunny, with a high near 75.

Night: Mostly clear, with a low around 52.

Wednesday Nov 26

Day: Mostly sunny, with a high near 70.

About San Marcos, TX

San Marcos () is a city and the county seat of Hays County, Texas, United States. The city is a part of the Greater Austin Metropolitan Area. San Marcos's limits extend into Caldwell and Guadalupe counties, as well. San Marcos is on the Interstate 35 corridor between Austin and San Antonio. Its population was 44,894 at the 2010 census and 67,553 at the 2020 census. Founded on the banks of the San Marcos River, the area is thought to be among the oldest continuously inhabited sites in the Americas. San Marcos is home to Texas State University and the Meadows Center for Water and the Environment. In 2010, San Marcos was listed in Business Week's fourth annual survey of the "Best Places to Raise your Kids". In 2013 and 2014, the United States Census Bureau named it the fastest-growing city in the United States. In December 2013, it was named number nine on Business Insider's list of the "10 Most Exciting Small Cities In America".

Content from Wikipedia, licensed under CC BY-SA 3.0.

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Current conditions: We use the nearest available station to your location - including professional MESONET/MADIS and local weather stations - often miles closer than regional airports.

Forecasts: National Weather Service point forecasts predict for your specific area, not broad regional zones, making them far more relevant to your location.

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