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

Mid Valley Airport (KTXW)

Lat: 26.18°NLon: 97.97°WElev: 70ft.

Fair

83°F

28°C

Humidity 82%
Wind Speed SE 6 mph
Barometer 29.74 in
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index92°F (33°C)
Last update 1 Oct 6:35 am CDT
Extended Forecast for

Mercedes TX

  • Today

    Today: A slight chance of showers before 7am, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 99. Heat index values as high as 110. Southeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.

    High: 99 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms likely. Partly cloudy during the early evening, then becoming cloudy, with a low around 77. Southeast wind 6 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 77 °F

    Chance
    T-storms then
    Showers
    Likely

  • Friday

    Friday: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 4pm. High near 93. Light and variable wind becoming east northeast 5 to 8 mph in the morning. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 93 °F

    Chance
    Showers then
    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm. Low around 74. East northeast wind 5 to 7 mph becoming calm. Chance of precipitation is 90%.

    Low: 74 °F

    Showers

  • Saturday

    Saturday: Showers and possibly a thunderstorm. High near 90. North wind 7 to 9 mph. Chance of precipitation is 90%.

    High: 90 °F

    Showers
    Likely then
    Showers

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 73. North wind 5 to 8 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    Low: 73 °F

    Showers
    Likely

  • Sunday

    Sunday: Showers and possibly a thunderstorm. High near 87. North wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 80%.

    High: 87 °F

    Showers

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm. Low around 72. North northwest wind 6 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 80%.

    Low: 72 °F

    Showers

  • Monday

    Monday: Showers and possibly a thunderstorm. High near 86. North wind 11 to 13 mph, with gusts as high as 28 mph. Chance of precipitation is 80%.

    High: 86 °F

    Showers

Detailed Forecast

Today
A slight chance of showers before 7am, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 99. Heat index values as high as 110. Southeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
Tonight
Showers and thunderstorms likely. Partly cloudy during the early evening, then becoming cloudy, with a low around 77. Southeast wind 6 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Friday
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 4pm. High near 93. Light and variable wind becoming east northeast 5 to 8 mph in the morning. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Friday Night
Showers and possibly a thunderstorm. Low around 74. East northeast wind 5 to 7 mph becoming calm. Chance of precipitation is 90%.
Saturday
Showers and possibly a thunderstorm. High near 90. North wind 7 to 9 mph. Chance of precipitation is 90%.
Saturday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 73. North wind 5 to 8 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Sunday
Showers and possibly a thunderstorm. High near 87. North wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 80%.
Sunday Night
Showers and possibly a thunderstorm. Low around 72. North northwest wind 6 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 80%.
Monday
Showers and possibly a thunderstorm. High near 86. North wind 11 to 13 mph, with gusts as high as 28 mph. Chance of precipitation is 80%.
Monday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 72. North wind 5 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 60%.
Tuesday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87. North wind around 11 mph, with gusts as high as 25 mph.
Tuesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 71.
Wednesday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
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ABOUT THIS FORECAST

 
Point Forecast:
Mercedes TX
 26.14°N 97.93°W
Last Update:
6:30 am CDT Oct 1, 2026
Forecast Valid:
6am CDT Oct 1, 2026-6pm CDT Oct 7, 2026
 
Forecast Discussion
 
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Additional Resources

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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