Harlingen, TX 78551 Weather

Cameron County7:02 AM CDT26.24°N, 97.72°W

Current conditions

Clear
64°
Clear
Feels like 64°
High 86°·Low 71°
WindNW 8 mph
Humidity94%
Dew point63°
Pressure30.07 inHg
Visibility10 mi
Cloud cover25%
UV index0 Low
Sunrise7:34 AM
Sunset6:59 PM

Observed at Harlingen, Rio Grande Valley International Airport · 27 min ago

Forecast

10-day

  • Wednesday

    A chance of showers and thunderstorms between 1pm and 5pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 86. North northeast wind 6 to 9 mph. Chance of precipitation is 40%.

  • Wednesday Night

    A slight chance of rain showers after 4am. Partly cloudy, with a low around 71. East northeast wind 2 to 9 mph. Chance of precipitation is 20%.

  • Thursday

    A chance of rain showers before 3pm. Partly sunny, with a high near 83. Northeast wind 3 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.

National Weather Service forecast updated 1 hr ago.

Hourly

Hourly forecast
  1. Now Sunny 70°
  2. 8 AM Mostly Sunny 70°
  3. 9 AM Sunny 72°
  4. 10 AM Mostly Sunny 76°
  5. 11 AM Mostly Sunny 79°11%
  6. 12 PM Mostly Sunny 83°14%
  7. 1 PM Chance Showers And Thunderstorms 84°37%
  8. 2 PM Chance Showers And Thunderstorms 85°40%
  9. 3 PM Chance Showers And Thunderstorms 85°38%
  10. 4 PM Chance Showers And Thunderstorms 84°31%
  11. 5 PM Slight Chance Showers And Thunderstorms 83°21%
  12. 6 PM Partly Cloudy 82°12%
  13. 7 PM Mostly Cloudy 78°13%
  14. 8 PM Mostly Cloudy 77°11%
  15. 9 PM Partly Cloudy 76°
  16. 10 PM Mostly Clear 75°12%
  17. 11 PM Mostly Cloudy 74°14%
  18. Thu12 AM Partly Cloudy 73°14%
  19. 1 AM Partly Cloudy 73°
  20. 2 AM Partly Cloudy 73°10%
  21. 3 AM Partly Cloudy 72°11%
  22. 4 AM Slight Chance Rain Showers 72°15%
  23. 5 AM Slight Chance Rain Showers 71°17%
  24. 6 AM Slight Chance Rain Showers 71°15%

10-day forecast

Details
  1. TonightOct 20 Mostly Clear Mostly Clear69°
  2. TodayOct 21 Mostly Sunny then Chance Showers And Thunderstorms Mostly Sunny then Chance Showers And Thunderstorms40%71°86°
  3. ThuOct 22 Chance Rain Showers Chance Rain Showers36%65°83°
  4. FriOct 23 Sunny Sunny68°86°
  5. SatOct 24 Mostly Sunny then Slight Chance Rain Showers Mostly Sunny then Slight Chance Rain Showers16%69°85°
  6. SunOct 25 Partly Sunny Partly Sunny66°83°
  7. MonOct 26 Mostly Sunny then Slight Chance Showers And Thunderstorms Mostly Sunny then Slight Chance Showers And Thunderstorms21%68°85°
  8. TueOct 27 Chance Showers And Thunderstorms Chance Showers And Thunderstorms38%83°
  9. WedOct 28 Rain Rain0.26 in65°72°
  10. ThuOct 29 Sunny Sunny57°70°

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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Air quality

53
Moderate
Fine particles (PM2.5)

Acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Forecast

  • WedGood
  • ThuGood
  • FriGood

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 7:34 AM
Sunset 6:59 PM
Daylight 11 h 24 min (−1 min 28 s tomorrow)
Waxing Gibbous · 77% lit
Moonrise 4:11 PM Moonset 3:10 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Normal high / low87° / 66°
Record high97° (1956)
Record low44° (1964)
Wettest1.89 in (2002)
Yesterday85° / 65°
Month to date4.70 in (normal 2.14 in)

Harlingen, records since 1912. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).

Nearby

Forecasters' discussion

From the National Weather Service office in BRO, issued 6 hrs ago

Key Messages

Updated at 1242 AM CDT Wed Oct 21 2026

- Showers and thunderstorms over the Gulf moving inland will bring low to moderate (20-50%) rain chances primarily east of US-281 today, and across Deep South Texas into Thursday.

- Narrow beaches around high tide are possible today.

- Overall seasonable temperatures and pleasant weather expected this weekend.

- Rain chances return early next week as a mid-level trough approaches the area.

Discussion

Issued at 1045 PM CDT Tue Oct 20 2026

Rain chances increase through Wednesday morning as deep moisture interacts with coastal troughing offshore. Isolated showers over the Gulf waters will continue to move west-southwest, bringing isolated showers to the coast. As moisture encroaches westward, isolated to scattered showers and thunderstorms are expected to move inland late Wednesday morning through Wednesday afternoon. Shower coverage should diminish as it travels inland, with moderate PoPs (40-70%) focused east of US-281, highest along the coast. Isolated showers will continue working their way inland Wednesday night into Thursday. Rainfall amounts should generally be less than a half an inch, but isolated higher amounts to 2 inches are possible under heavier showers. Rain chances diminish Friday through the weekend bar afternoon sea breeze showers, before increasing again early next week ahead of an approaching trough.

High pressure over NE Mexico will return fair weather Friday into the weekend, with isolated sea breeze showers possible in the afternoons. Temperatures remain seasonable with highs in the upper 80s and lows in the 60s to low 70s.

Long-period swell and northeast winds will keep local beaches narrow. Minor coastal flooding is possible near high tide. Current guidance keeps water levels below minor flooding thresholds, but conditions will continue to be monitored.

Aviation

(06Z TAFS) Issued at 1242 AM CDT Wed Oct 21 2026

Predominantly VFR conditions are forecast through the period, however MVFR conditions are possible early afternoon at BRO and HRL. Convection along the sea breeze may result in showers and thunderstorms producing MVFR ceilings and visibilities. Light and variable winds are forecast to continue through the mid morning, becoming northeasterly to easterly into the afternoon.

Marine

Issued at 1045 PM CDT Tue Oct 20 2026

Lingering moderate seas will result in intermittent SCEC conditions on the Gulf today. There is a medium to high (40-80%) chance of rain Wednesday and Wednesday night as a coastal trough interacts with deep moisture. Thursday and Friday, conditions improve as seas decrease to slight. Gentle to fresh onshore winds will continue through the week. This weekend, conditions may deteriorate yet again ahead of an approaching trough.

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.