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- New: Summer (June-August) 2025 Review: Still Hot with "Just-in-Time" Rains that Kept Drought to a Minimum
- New: Autumn (September-November) Outlook - Early Rains? Otherwise, Warm/Hot and Generally Dry for Most of the Season
- Check Out the 2025 Rio Grande Valley/Deep South Texas Hurricane Guide
- Guia de Huracanes 2025 del Valle del Rio Grande/Extremo Sur de Texas
Current conditions at
Mid Valley Airport (KTXW)
Lat: 26.18°NLon: 97.97°WElev: 70ft.
Partly Cloudy
77°F
25°C
Humidity | 94% |
Wind Speed | Calm |
Barometer | 30.01 in |
Dewpoint | 75°F (24°C) |
Visibility | 10.00 mi |
Heat Index | 78°F (26°C) |
Last update | 11 Sep 2:55 am CDT |
Extended Forecast for
Mercedes TX
Overnight
Low: 76 °F
Chance
ShowersThursday
High: 93 °F
Chance
Showers then
Chance
T-stormsThursday Night
Low: 76 °F
Slight Chance
T-storms then
Mostly ClearFriday
High: 92 °F
Showers
LikelyFriday Night
Low: 76 °F
Chance
ShowersSaturday
High: 93 °F
Chance
Showers then
Chance
T-stormsSaturday Night
Low: 75 °F
Mostly Clear
Sunday
High: 93 °F
Chance
Showers then
Chance
T-stormsSunday Night
Low: 74 °F
Slight Chance
Showers
Detailed Forecast
Overnight
A 30 percent chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 76. Calm wind.
Thursday
A 50 percent chance of showers and thunderstorms, mainly after noon. Mostly sunny, with a high near 93. Light and variable wind becoming east 5 to 10 mph in the morning. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
A 20 percent chance of showers and thunderstorms before 9pm. Mostly clear, with a low around 76. East wind 5 to 10 mph becoming light and variable in the evening.
Friday
A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 92. Light and variable wind becoming east 5 to 10 mph in the morning. Chance of precipitation is 60%.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 76. East wind 5 to 10 mph becoming light after midnight. Chance of precipitation is 30%.
Saturday
A chance of showers, with thunderstorms also possible after 10am. Mostly sunny, with a high near 93. Light east northeast wind becoming east 6 to 11 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 50%.
Saturday Night
Mostly clear, with a low around 75. East wind 5 to 10 mph becoming light east southeast.
Sunday
A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 93. East wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
Sunday Night
A 20 percent chance of showers. Mostly clear, with a low around 74. East wind 5 to 10 mph becoming light after midnight.
Monday
A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 93. East wind 5 to 10 mph. Chance of precipitation is 50%.
Monday Night
A 30 percent chance of showers. Mostly clear, with a low around 74. East wind 5 to 10 mph becoming light after midnight.
Tuesday
Showers likely and possibly a thunderstorm. Mostly sunny, with a high near 93. Chance of precipitation is 60%.
Tuesday Night
A 30 percent chance of showers. Partly cloudy, with a low around 75.
Wednesday
Showers likely and possibly a thunderstorm. Mostly sunny, with a high near 93. Chance of precipitation is 70%.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Mercedes TX
26.14°N 97.93°W
26.14°N 97.93°W
3:00 am CDT Sep 11, 2025
3am CDT Sep 11, 2025-6pm CDT Sep 17, 2025