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

Below Normal Temperatures Continue

A strong cold front will sweep through the East on Wednesday with heavy wet snow from the eastern Great Lakes into northern New England and strong thunderstorms with damaging winds in the Mid-Atlantic and Northeast. The big story though will continue to be the well below average temperatures behind this storm system or east of the Rockies, as numerous record low temperatures are likely. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

57°F

14°C

Humidity 49%
Wind Speed N 18 mph
Barometer 30.21 in (1022.2 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 20 Apr 11:56 pm CDT
Extended Forecast for

San Marcos TX

  • Overnight

    Overnight: Mostly clear, with a low around 44. North northeast wind around 15 mph, with gusts as high as 30 mph.

    Mostly Clear

    Low: 44 °F

  • Wednesday

    Wednesday: Mostly sunny, with a high near 69. Northeast wind 10 to 15 mph, with gusts as high as 25 mph.

    Mostly Sunny

    High: 69 °F

  • Wednesday
    Night

    Wednesday Night: Partly cloudy, with a low around 50. East northeast wind 5 to 10 mph.

    Partly Cloudy

    Low: 50 °F

  • Thursday

    Thursday: A 30 percent chance of showers after 1pm. Cloudy, with a high near 68. East wind 5 to 15 mph, with gusts as high as 20 mph.

    Mostly Cloudy
    then Chance
    Showers

    High: 68 °F

  • Thursday
    Night

    Thursday Night: A 50 percent chance of showers and thunderstorms. Cloudy, with a low around 62. Southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Chance
    Showers

    Low: 62 °F

  • Friday

    Friday: Showers and thunderstorms. High near 81. South southeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

    T-storms

    High: 81 °F

  • Friday
    Night

    Friday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 61. South wind 5 to 10 mph becoming west after midnight. Winds could gust as high as 20 mph.

    Slight Chance
    T-storms

    Low: 61 °F

  • Saturday

    Saturday: Sunny, with a high near 83. North wind 10 to 20 mph, with gusts as high as 25 mph.

    Sunny

    High: 83 °F

  • Saturday
    Night

    Saturday Night: Mostly clear, with a low around 54. North northeast wind 5 to 15 mph, with gusts as high as 20 mph.

    Mostly Clear

    Low: 54 °F

Detailed Forecast

Overnight
Mostly clear, with a low around 44. North northeast wind around 15 mph, with gusts as high as 30 mph.
Wednesday
Mostly sunny, with a high near 69. Northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
Partly cloudy, with a low around 50. East northeast wind 5 to 10 mph.
Thursday
A 30 percent chance of showers after 1pm. Cloudy, with a high near 68. East wind 5 to 15 mph, with gusts as high as 20 mph.
Thursday Night
A 50 percent chance of showers and thunderstorms. Cloudy, with a low around 62. Southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Friday
Showers and thunderstorms. High near 81. South southeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 61. South wind 5 to 10 mph becoming west after midnight. Winds could gust as high as 20 mph.
Saturday
Sunny, with a high near 83. North wind 10 to 20 mph, with gusts as high as 25 mph.
Saturday Night
Mostly clear, with a low around 54. North northeast wind 5 to 15 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 85.
Sunday Night
Partly cloudy, with a low around 59.
Monday
Partly sunny, with a high near 86.
Monday Night
Mostly cloudy, with a low around 64.
Tuesday
Partly sunny, with a high near 89.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
San Marcos TX
 29.88°N 97.94°W (Elev. 577 ft)
Last Update:
6:36 pm CDT Apr 20, 2021
Forecast Valid:
12am CDT Apr 21, 2021-6pm CDT Apr 26, 2021
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation