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Heavy Rain and Flooding in the Southern Plains to the Great Lakes

Several days of heavy rainfall will lead to flash flooding and river flooding from the Southern Plains to the Southern Great Lakes. A band of freezing rain is forecast across portions of the Southern Plains into the Middle Mississippi Valley. Read More >

Hazardous Weather Conditions

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Light Rain and Breezy

42°F

6°C

Humidity 89%
Wind Speed N 22 G 26 mph
Barometer 30.15 in (1020.5 mb)
Dewpoint 39°F (4°C)
Visibility 7.00 mi
Wind Chill33°F (1°C)
Last update 21 Feb 2:56 pm CST
Extended Forecast for

San Marcos TX

  • This
    Afternoon

    This Afternoon: Showers and thunderstorms likely.  Cloudy, with a steady temperature around 40. North wind around 15 mph, with gusts as high as 20 mph.  Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    T-storms
    Likely

    High: 40 °F

  • Tonight

    Tonight: Showers likely, mainly after 2am.  Mostly cloudy, with a low around 39. North wind 10 to 15 mph, with gusts as high as 20 mph.  Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Showers
    Likely

    Low: 39 °F

  • Thursday

    Thursday: Showers likely.  Cloudy, with a high near 52. North wind around 10 mph.  Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Showers
    Likely

    High: 52 °F

  • Thursday
    Night

    Thursday Night: Showers likely and possibly a thunderstorm.  Cloudy, with a low around 46. North northeast wind 5 to 10 mph.  Chance of precipitation is 60%.

    Showers
    Likely

    Low: 46 °F

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms.  Cloudy, with a high near 70. Northeast wind 5 to 10 mph becoming south southeast in the afternoon.

    Chance
    Showers

    High: 70 °F

  • Friday
    Night

    Friday Night: A 40 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 62. South wind around 10 mph.

    Chance
    T-storms

    Low: 62 °F

  • Saturday

    Saturday: Showers and thunderstorms likely.  Mostly cloudy, with a high near 73. South wind around 10 mph becoming north northwest in the afternoon.  Chance of precipitation is 60%.

    T-storms
    Likely

    High: 73 °F

  • Saturday
    Night

    Saturday Night: Partly cloudy, with a low around 49. North northeast wind 5 to 10 mph.

    Partly Cloudy

    Low: 49 °F

  • Sunday

    Sunday: A 30 percent chance of showers.  Partly sunny, with a high near 66. North northeast wind around 5 mph becoming east in the afternoon.

    Chance
    Showers

    High: 66 °F

Detailed Forecast

This Afternoon
Showers and thunderstorms likely. Cloudy, with a steady temperature around 40. North wind around 15 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers likely, mainly after 2am. Mostly cloudy, with a low around 39. North wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Showers likely. Cloudy, with a high near 52. North wind around 10 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
Showers likely and possibly a thunderstorm. Cloudy, with a low around 46. North northeast wind 5 to 10 mph. Chance of precipitation is 60%.
Friday
A 50 percent chance of showers and thunderstorms. Cloudy, with a high near 70. Northeast wind 5 to 10 mph becoming south southeast in the afternoon.
Friday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 62. South wind around 10 mph.
Saturday
Showers and thunderstorms likely. Mostly cloudy, with a high near 73. South wind around 10 mph becoming north northwest in the afternoon. Chance of precipitation is 60%.
Saturday Night
Partly cloudy, with a low around 49. North northeast wind 5 to 10 mph.
Sunday
A 30 percent chance of showers. Partly sunny, with a high near 66. North northeast wind around 5 mph becoming east in the afternoon.
Sunday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 46.
Monday
A 20 percent chance of showers. Mostly sunny, with a high near 71.
Monday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 51.
Tuesday
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 69.
Click Map For Forecast
Point Forecast:
San Marcos TX
 29.88°N 97.94°W (Elev. 577 ft)
3:12 pm CST Feb 21, 2018
3pm CST Feb 21, 2018-6pm CST Feb 27, 2018
 
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