Mercedes, TX 78570 Weather

Hidalgo County11:34 PM CDT26.15°N, 97.92°W

Current conditions

Partly Cloudy
74°
Partly Cloudy
Feels like 75°
High 88° Friday·Low 68° tonight
WindENE 5 mph
Humidity81%
Dew point68°
Pressure30.11 inHg
Visibility10.0 mi
Cloud cover34%
UV index0 Low
Sunrise7:35 AM
Sunset6:59 PM

Observed at Mid Valley Airport · 39 min ago

Forecast

10-day

  • Tonight

    Mostly clear, with a low around 68. East northeast wind around 5 mph.

  • Friday

    Mostly sunny, with a high near 88. East northeast wind 3 to 13 mph, with gusts as high as 23 mph.

  • Friday Night

    Mostly clear, with a low around 69. East southeast wind 5 to 13 mph, with gusts as high as 23 mph.

National Weather Service forecast updated 2 hrs ago.

Hourly

Hourly forecast
  1. Now Partly Cloudy 74°
  2. Fri12 AM Partly Cloudy 73°
  3. 1 AM Mostly Clear 72°
  4. 2 AM Clear 71°
  5. 3 AM Partly Cloudy 70°
  6. 4 AM Mostly Clear 69°
  7. 5 AM Mostly Clear 69°
  8. 6 AM Sunny 68°
  9. 7 AM Sunny 68°
  10. 8 AM Sunny 68°
  11. 9 AM Mostly Sunny 72°
  12. 10 AM Sunny 78°
  13. 11 AM Sunny 81°
  14. 12 PM Sunny 84°
  15. 1 PM Mostly Sunny 86°
  16. 2 PM Mostly Sunny 87°
  17. 3 PM Mostly Sunny 87°
  18. 4 PM Mostly Sunny 87°
  19. 5 PM Sunny 86°
  20. 6 PM Mostly Clear 84°
  21. 7 PM Mostly Clear 79°
  22. 8 PM Mostly Clear 77°
  23. 9 PM Mostly Clear 75°
  24. 10 PM Mostly Clear 74°

10-day forecast

Details
  1. TonightOct 22 Mostly Clear Mostly Clear68°
  2. FriOct 23 Mostly Sunny Mostly Sunny69°88°
  3. SatOct 24 Mostly Sunny then Slight Chance Rain Showers Mostly Sunny then Slight Chance Rain Showers15%71°88°
  4. SunOct 25 Partly Sunny Partly Sunny68°86°
  5. MonOct 26 Mostly Sunny Mostly Sunny26%68°87°
  6. TueOct 27 Chance Showers And Thunderstorms Chance Showers And Thunderstorms51%68°84°
  7. WedOct 28 Mostly Sunny then Chance Showers And Thunderstorms Mostly Sunny then Chance Showers And Thunderstorms31%67°84°
  8. ThuOct 29 Chance Rain Showers Chance Rain Showers28%84°
  9. FriOct 30 Showers Showers0.24 in72°80°
  10. SatOct 31 Showers Showers0.15 in73°85°

Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.

Radar

Full map
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Weather news in Texas

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Air quality

49
Good
Fine particles (PM2.5)

Air quality is satisfactory, and air pollution poses little or no risk.

Forecast

  • ThuGood
  • FriGood
  • SatGood

Brownsville-McAllen, TX reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.

Sun & moon

Sunrise 7:35 AM
Sunset 6:59 PM
Daylight 11 h 23 min (−1 min 26 s tomorrow)
Waxing Gibbous · 89% lit
Moonrise 4:43 PM Moonset 4:06 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Normal high / low88° / 67°
Record high98° (2017)
Record low46° (1965)
Wettest1.58 in (1992)
Yesterday91° / 66°
Month to date3.65 in (normal 1.51 in)

McAllen Area, records since 1941. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).

Nearby

Forecasters' discussion

From the National Weather Service office in BRO, issued 1 hr ago

Key Messages

Updated at 958 PM CDT Thu Oct 22 2026

- Minimal rain chances are anticipated to continue tonight into the beginning of next week before low to medium chances of rain return Tuesday.

- Near average temperatures and patchy to widespread minor risks of heat-related illnesses (level 1/4) continue.

Discussion

Issued at 958 PM CDT Thu Oct 22 2026

Pleasant weather expected for much of the short term as ridging builds overhead. Mostly dry conditions are expected through the weekend, with only a low (20-30%) chance of showers Saturday in the mid-upper RGV and Rio Grande Plains as a weak shortwave transits through. Moisture will be somewhat limited, keeping rainfall coverage low. Temperatures will remain seasonal, with highs in the upper 80s to low 90s and overnight lows in the 60s inland to lower 70s along the coast.

Rain chances increase again early next week as ridging shifts offshore and an upper-level trough moves eastward across central CONUS. Although the trough is expected to remain north of the region, increasing moisture and instability will support scattered showers and thunderstorms developing as early as Monday night. Low to moderate PoPs (30-50%) are expected Tuesday into Wednesday as moisture is pulled inland from the Gulf. Rain chances could persist through late next week as an upper-level disturbance could transport further deeper moisture into the region.

Aviation

(00Z TAFS) Issued at 616 PM CDT Thu Oct 22 2026

VFR conditions prevail through the TAF cycle, but lingering coastal moisture may bring light rain and briefly lower clouds this evening as showers move out of the area, particularly at MFE. Winds become light and variable overnight, generally easterly, before increasing to around 10 kts from the southeast Friday morning.

Marine

Issued at 958 PM CDT Thu Oct 22 2026

Gentle to moderate onshore winds and slight seas prevail into Saturday. Winds increase and seas build to moderate this weekend ahead of an approaching trough, returning adverse marine conditions. Low (10% or less) rain chances today and this weekend will increase as the trough transits eastward, increasing rain chances early next week.

Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Conservative index and reflects what the press published. Terms of use.