News Headlines
- WE ARE HIRING: NWS Brownsville/Rio Grande Valley is officially hiring a GS-5/7/9 Meteorologist. Apply today at USAJobs!
- New: Hot, Windy, and Rain-Free Weather Since Late June Brought on a Rapid-Onset Drought to Portions of the RGV in Early August
- New: August-October 2026 Outlook - Hotter Than Normal And Mainly Dry Conditions Are Expected To Continue; Could Turn Wetter Towards The Fall; Heat Risk, Drought, Fire Weather, And Water Supply Issues Remain In Focus
- Notice: Rio Grande City NOAA Weather Radio Remains Out of Service Until Further Notice
- Check Out the 2026 Rio Grande Valley/Deep South Texas Hurricane Guide
Current conditions at
Mid Valley Airport (KTXW)
Lat: 26.18°NLon: 97.97°WElev: 70ft.
Fair
83°F
28°C
| Humidity | 80% |
| Wind Speed | SE 12 G 18 mph |
| Barometer | 29.92 in |
| Dewpoint | 76°F (24°C) |
| Visibility | 10.00 mi |
| Heat Index | 91°F (33°C) |
| Last update | 13 Aug 2:35 am CDT |
Extended Forecast for
Mercedes TX
Overnight
Low: 80 °F
Mostly Clear
Thursday
High: 100 °F
Sunny then
Sunny and
BreezyThursday Night
Low: 80 °F
Mostly Clear
and Breezy
then Mostly
ClearFriday
High: 99 °F
Sunny
Friday Night
Low: 80 °F
Mostly Clear
Saturday
High: 100 °F
Hot
Saturday Night
Low: 79 °F
Partly Cloudy
Sunday
High: 99 °F
Sunny
Sunday Night
Low: 78 °F
Mostly Clear
Detailed Forecast
Overnight
Mostly clear, with a low around 80. South southeast wind 11 to 13 mph, with gusts as high as 26 mph.
Thursday
Sunny and hot, with a high near 100. Heat index values as high as 109. Breezy, with a south southeast wind 13 to 18 mph, with gusts as high as 31 mph.
Thursday Night
Mostly clear, with a low around 80. Breezy, with a south southeast wind 10 to 18 mph, with gusts as high as 31 mph.
Friday
Sunny, with a high near 99. Heat index values as high as 108. South southeast wind 10 to 17 mph, with gusts as high as 29 mph.
Friday Night
Mostly clear, with a low around 80. South southeast wind 9 to 17 mph, with gusts as high as 29 mph.
Saturday
Mostly sunny and hot, with a high near 100. Southeast wind 8 to 15 mph, with gusts as high as 25 mph.
Saturday Night
Partly cloudy, with a low around 79. East southeast wind 5 to 15 mph, with gusts as high as 25 mph.
Sunday
Sunny, with a high near 99. Light east southeast wind increasing to 8 to 13 mph in the morning. Winds could gust as high as 22 mph.
Sunday Night
Mostly clear, with a low around 78. East southeast wind 10 to 15 mph becoming light southeast after midnight. Winds could gust as high as 24 mph.
Monday
Sunny and hot, with a high near 100. Light east southeast wind increasing to 6 to 11 mph in the morning.
Monday Night
Mostly clear, with a low around 78. South southeast wind 5 to 14 mph, with gusts as high as 22 mph.
Tuesday
Sunny and hot, with a high near 100.
Tuesday Night
Mostly clear, with a low around 78.
Wednesday
Sunny and hot, with a high near 100.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Mercedes TX
26.14°N 97.93°W
26.14°N 97.93°W
2:47 am CDT Aug 13, 2026
3am CDT Aug 13, 2026-6pm CDT Aug 19, 2026
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