News Headlines
- Rapid-Onset (Flash) Drought Continues to Worsen Across the RGV/Deep S. Texas Ranchlands. Click Here for Details.
- RGV Summer (June-August) Weather and Climate Summary - Early Rain Gives Way to Brutal El Nino-Driven Heat, Drought
- New: September-November 2026 Outlook - Warmer Than Normal Conditions Favored; Precipitation A Toss-Up, But Could Trend Wetter Later This Fall; Heat Risk, Drought, Fire Weather, And Water Supply Issues Remain In Focus
- The 2026 Atlantic Hurricane Season is Fading...but is not Over Yet. 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
85°F
29°C
| Humidity | 71% |
| Wind Speed | SE 8 mph |
| Barometer | 29.92 in |
| Dewpoint | 74°F (23°C) |
| Visibility | 10.00 mi |
| Heat Index | 93°F (34°C) |
| Last update | 26 Sep 9:35 pm CDT |
Extended Forecast for
Mercedes TX
Tonight
Low: 76 °F
Mostly Clear
Sunday
High: 99 °F
Increasing
CloudsSunday Night
Low: 76 °F
Partly Cloudy
Monday
High: 98 °F
Sunny then
Slight Chance
T-stormsMonday Night
Low: 77 °F
Partly Cloudy
Tuesday
High: 99 °F
Mostly Sunny
Tuesday Night
Low: 80 °F
Partly Cloudy
Wednesday
High: 100 °F
Hot and
BreezyWednesday Night
Low: 80 °F
Slight Chance
Showers and
Breezy
Detailed Forecast
Tonight
Mostly clear, with a low around 76. East southeast wind 5 to 7 mph becoming calm in the evening.
Sunday
Increasing clouds, with a high near 99. Heat index values as high as 105. Calm wind becoming east 5 to 7 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 76. East southeast wind 8 to 13 mph becoming light southeast after midnight. Winds could gust as high as 23 mph.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 98. Heat index values as high as 105. Light east wind becoming east southeast 6 to 11 mph in the afternoon. Winds could gust as high as 21 mph.
Monday Night
Partly cloudy, with a low around 77. East southeast wind 6 to 14 mph, with gusts as high as 24 mph.
Tuesday
Mostly sunny, with a high near 99. Southeast wind 6 to 16 mph, with gusts as high as 28 mph.
Tuesday Night
Partly cloudy, with a low around 80. Southeast wind around 17 mph, with gusts as high as 30 mph.
Wednesday
Mostly sunny and hot, with a high near 100. Breezy, with a south southeast wind 16 to 20 mph, with gusts as high as 36 mph.
Wednesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 80. Breezy, with a southeast wind 15 to 21 mph, with gusts as high as 34 mph.
Thursday
A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 96. South southeast wind 13 to 15 mph, with gusts as high as 29 mph. Chance of precipitation is 50%.
Thursday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 76. Southeast wind 8 to 11 mph, with gusts as high as 23 mph.
Friday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 92. Chance of precipitation is 60%.
Friday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 74.
Saturday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
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
9:45 pm CDT Sep 26, 2026
9pm CDT Sep 26, 2026-6pm CDT Oct 3, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
