News Headlines
- WE ARE HIRING: NWS Brownsville/Rio Grande Valley is officially hiring a GS-5/7/9 Meteorologist. Apply today at USAJobs!
- New: July-September 2026 Outlook - Hotter Than Normal And Mainly Dry Conditions Are Expected; Heat Risk And Water Supply Issues To Remain In Focus
- Check Out the 2026 Rio Grande Valley/Deep South Texas Hurricane Guide
- Guia de Huracanes 2026 del Valle del Rio Grande/Extremo Sur de Texas
- The 2026 Hurricane Season is Here! Are You Ready? Know Your Risk, Check Your Plans, Restock Your Kits, and More
Current conditions at
Mid Valley Airport (KTXW)
Lat: 26.18°NLon: 97.97°WElev: 70ft.
Fair
95°F
35°C
| Humidity | 41% |
| Wind Speed | SE 14 G 24 mph |
| Barometer | 30.02 in |
| Dewpoint | 68°F (20°C) |
| Visibility | 10.00 mi |
| Heat Index | 100°F (38°C) |
| Last update | 7 Jul 1:35 pm CDT |
Extended Forecast for
Mercedes TX
This Afternoon
High: 97 °F
Slight Chance
T-stormsTonight
Low: 78 °F
Mostly Clear
Wednesday
High: 97 °F
Sunny then
Slight Chance
T-stormsWednesday Night
Low: 76 °F
Mostly Clear
Thursday
High: 95 °F
Sunny then
Slight Chance
T-stormsThursday Night
Low: 77 °F
Mostly Clear
Friday
High: 94 °F
Chance
T-stormsFriday Night
Low: 78 °F
Partly Cloudy
Saturday
High: 95 °F
Slight Chance
T-storms
Detailed Forecast
This Afternoon
A 20 percent chance of showers and thunderstorms before 3pm. Mostly sunny, with a high near 97. Heat index values as high as 105. Southeast wind around 14 mph, with gusts as high as 22 mph.
Tonight
Mostly clear, with a low around 78. Southeast wind 7 to 15 mph, with gusts as high as 24 mph.
Wednesday
A slight chance of showers and thunderstorms between 2pm and 3pm. Sunny, with a high near 97. Southeast wind 6 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.
Wednesday Night
Mostly clear, with a low around 76. South southeast wind 6 to 15 mph, with gusts as high as 25 mph.
Thursday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 95. Southeast wind 6 to 16 mph, with gusts as high as 26 mph.
Thursday Night
Mostly clear, with a low around 77. Southeast wind 7 to 15 mph, with gusts as high as 25 mph.
Friday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 94. Southeast wind 7 to 16 mph, with gusts as high as 26 mph.
Friday Night
Partly cloudy, with a low around 78. Southeast wind 8 to 16 mph, with gusts as high as 26 mph.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 95. Southeast wind 9 to 16 mph, with gusts as high as 26 mph.
Saturday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 78. Southeast wind 7 to 16 mph, with gusts as high as 25 mph.
Sunday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 96. Southeast wind 7 to 16 mph, with gusts as high as 26 mph.
Sunday Night
Mostly clear, with a low around 79.
Monday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 96.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
Mercedes TX
26.14°N 97.93°W
26.14°N 97.93°W
1:46 pm CDT Jul 7, 2026
1pm CDT Jul 7, 2026-6pm CDT Jul 13, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
