Monsoonal Moisture Remains Across the Southwest; Heat Endures for the South and West Coast

Heat concerns remain across portions of the South and West Coast where a few new daily record highs are forecast. Monsoonal moisture transport continues across areas of the Southwest into early next week and may generate flash flooding, especially near recent burn scars. Further east, showers and thunderstorms are expected along and ahead of a cold front from the Plains to the Appalachians. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

A Few Clouds

83°F

28°C

Humidity 59%
Wind Speed SW 5 mph
Barometer 30.12 in (1018.9 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 27 Jun 12:56 am CDT
Extended Forecast for

San Marcos TX

  • Overnight

    Overnight: A 10 percent chance of showers and thunderstorms after 5am.  Mostly clear, with a low around 75. South southwest wind 5 to 10 mph.

    Slight Chance
    T-storms

    Low: 75 °F

  • Monday

    Monday: A slight chance of showers and thunderstorms before 8am, then a chance of showers and thunderstorms after 2pm.  Mostly sunny, with a high near 98. Heat index values as high as 101. West northwest wind 5 to 15 mph becoming northeast in the afternoon. Winds could gust as high as 25 mph.  Chance of precipitation is 30%.

    Chance
    T-storms

    High: 98 °F

  • Monday
    Night

    Monday Night: A 50 percent chance of showers and thunderstorms before 2am.  Mostly cloudy, with a low around 74. North wind 10 to 15 mph becoming south in the evening. Winds could gust as high as 25 mph.  New rainfall amounts between a quarter and half of an inch possible.

    Chance
    T-storms

    Low: 74 °F

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms after 8am.  Partly sunny, with a high near 92. Northeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Chance
    T-storms

    High: 92 °F

  • Tuesday
    Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms before 8pm.  Partly cloudy, with a low around 73. East northeast wind 5 to 10 mph becoming southeast after midnight. Winds could gust as high as 20 mph.

    Chance
    T-storms then
    Partly Cloudy

    Low: 73 °F

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms after 2pm.  Mostly sunny, with a high near 90. North northeast wind 5 to 15 mph becoming east in the afternoon. Winds could gust as high as 25 mph.

    Mostly Sunny
    then Chance
    T-storms

    High: 90 °F

  • Wednesday
    Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms before 8pm.  Partly cloudy, with a low around 72. Southeast wind 5 to 15 mph, with gusts as high as 20 mph.

    Chance
    T-storms then
    Partly Cloudy

    Low: 72 °F

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms after 2pm.  Partly sunny, with a high near 87. East southeast wind 5 to 10 mph.

    Partly Sunny
    then Chance
    T-storms

    High: 87 °F

  • Thursday
    Night

    Thursday Night: A 30 percent chance of showers and thunderstorms before 8pm.  Partly cloudy, with a low around 73. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Chance
    T-storms then
    Partly Cloudy

    Low: 73 °F

Detailed Forecast

Overnight
A 10 percent chance of showers and thunderstorms after 5am. Mostly clear, with a low around 75. South southwest wind 5 to 10 mph.
Monday
A slight chance of showers and thunderstorms before 8am, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 98. Heat index values as high as 101. West northwest wind 5 to 15 mph becoming northeast in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 30%.
Monday Night
A 50 percent chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 74. North wind 10 to 15 mph becoming south in the evening. Winds could gust as high as 25 mph. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
A 40 percent chance of showers and thunderstorms after 8am. Partly sunny, with a high near 92. Northeast wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday Night
A 40 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 73. East northeast wind 5 to 10 mph becoming southeast after midnight. Winds could gust as high as 20 mph.
Wednesday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 90. North northeast wind 5 to 15 mph becoming east in the afternoon. Winds could gust as high as 25 mph.
Wednesday Night
A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 72. Southeast wind 5 to 15 mph, with gusts as high as 20 mph.
Thursday
A 30 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 87. East southeast wind 5 to 10 mph.
Thursday Night
A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 73. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Friday
A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 91.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 75.
Saturday
Mostly sunny, with a high near 95.
Saturday Night
Partly cloudy, with a low around 75.
Sunday
Mostly sunny, with a high near 96.
Click Map For Forecast
Point Forecast:
San Marcos TX
 29.88°N 97.94°W (Elev. 577 ft)
12:23 am CDT Jun 27, 2022
1am CDT Jun 27, 2022-6pm CDT Jul 3, 2022
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database