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

81°F

27°C

Humidity 86%
Wind Speed S 6 mph
Barometer 29.95 in
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index88°F (31°C)
Last update 23 Aug 1:15 am CDT
Extended Forecast for

Mercedes TX

  • Overnight

    Overnight: A 20 percent chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 77. South wind 3 to 6 mph.

    Low: 77 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Increasing clouds, with a high near 96. Calm wind becoming north around 6 mph in the afternoon. Chance of precipitation is 70%.

    High: 96 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 76. East southeast wind 5 to 8 mph becoming calm in the evening. Chance of precipitation is 60%.

    Low: 76 °F

    Chance
    T-storms then
    Showers
    Likely

  • Sunday

    Sunday: A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers and possibly a thunderstorm after 1pm. Patchy fog before 7am. High near 92. Calm wind becoming east northeast around 6 mph in the afternoon. Chance of precipitation is 80%.

    High: 92 °F

    Chance
    Showers and
    Patchy Fog
    then Showers

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 77. East southeast wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 40%.

    Low: 77 °F

    Chance
    Showers

  • Monday

    Monday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Patchy fog before 7am. Otherwise, mostly sunny, with a high near 94. Light east southeast wind becoming southeast 5 to 9 mph in the morning. Chance of precipitation is 60%.

    High: 94 °F

    Showers
    Likely and
    Patchy Fog

  • Monday Night

    Monday Night: A 20 percent chance of showers before 1am. Partly cloudy, with a low around 77. East southeast wind 5 to 10 mph.

    Low: 77 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 96. Southeast wind 5 to 11 mph.

    High: 96 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 77. Southeast wind 6 to 11 mph, with gusts as high as 20 mph.

    Low: 77 °F

    Mostly Clear

Detailed Forecast

Overnight
A 20 percent chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 77. South wind 3 to 6 mph.
Saturday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Increasing clouds, with a high near 96. Calm wind becoming north around 6 mph in the afternoon. Chance of precipitation is 70%.
Saturday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 76. East southeast wind 5 to 8 mph becoming calm in the evening. Chance of precipitation is 60%.
Sunday
A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers and possibly a thunderstorm after 1pm. Patchy fog before 7am. High near 92. Calm wind becoming east northeast around 6 mph in the afternoon. Chance of precipitation is 80%.
Sunday Night
A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 77. East southeast wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 40%.
Monday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Patchy fog before 7am. Otherwise, mostly sunny, with a high near 94. Light east southeast wind becoming southeast 5 to 9 mph in the morning. Chance of precipitation is 60%.
Monday Night
A 20 percent chance of showers before 1am. Partly cloudy, with a low around 77. East southeast wind 5 to 10 mph.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 96. Southeast wind 5 to 11 mph.
Tuesday Night
Mostly clear, with a low around 77. Southeast wind 6 to 11 mph, with gusts as high as 20 mph.
Wednesday
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 96. Southeast wind 5 to 11 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 77. Southeast wind 5 to 11 mph, with gusts as high as 20 mph.
Thursday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 96.
Thursday Night
Mostly clear, with a low around 76.
Friday
Sunny, with a high near 98.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mercedes TX
 26.16°N 97.93°W
Last Update:
1:18 am CDT Aug 23, 2025
Forecast Valid:
1am CDT Aug 23, 2025-6pm CDT Aug 29, 2025
 
Forecast Discussion
 
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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation