National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Harlingen, Rio Grande Valley International Airport (KHRL)

Lat: 26.23°NLon: 97.66°WElev: 33ft.

Fair

82°F

28°C

Humidity 88%
Wind Speed SE 6 mph
Barometer 29.98 in (1015.0 mb)
Dewpoint 78°F (26°C)
Visibility 10.00 mi
Heat Index91°F (33°C)
Last update 4 Aug 11:52 pm CDT
Extended Forecast for

Harlingen TX

  • Overnight

    Overnight: Partly cloudy, with a low around 79. South southeast wind around 7 mph.

    Low: 79 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 97. Light east southeast wind becoming east 5 to 10 mph in the morning.

    High: 97 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 78. East southeast wind 5 to 10 mph becoming light south southeast after midnight.

    Low: 78 °F

    Decreasing
    Clouds

  • Wednesday

    Wednesday: A slight chance of showers, with thunderstorms also possible after 10am. Mostly sunny, with a high near 99. Heat index values as high as 107. Light southeast wind increasing to 5 to 10 mph in the morning. Chance of precipitation is 20%.

    High: 99 °F

    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 78. South southeast wind 5 to 13 mph, with gusts as high as 20 mph.

    Low: 78 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 100. Light southeast wind increasing to 6 to 11 mph in the morning.

    High: 100 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 78. Southeast wind 6 to 13 mph, with gusts as high as 20 mph.

    Low: 78 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 100. South southeast wind 6 to 11 mph, with gusts as high as 20 mph.

    High: 100 °F

    Hot

  • Friday Night

    Friday Night: Clear, with a low around 77. Southeast wind 6 to 14 mph, with gusts as high as 21 mph.

    Low: 77 °F

    Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 79. South southeast wind around 7 mph.
Tuesday
A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 97. Light east southeast wind becoming east 5 to 10 mph in the morning.
Tuesday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 78. East southeast wind 5 to 10 mph becoming light south southeast after midnight.
Wednesday
A slight chance of showers, with thunderstorms also possible after 10am. Mostly sunny, with a high near 99. Heat index values as high as 107. Light southeast wind increasing to 5 to 10 mph in the morning. Chance of precipitation is 20%.
Wednesday Night
Mostly clear, with a low around 78. South southeast wind 5 to 13 mph, with gusts as high as 20 mph.
Thursday
Sunny and hot, with a high near 100. Light southeast wind increasing to 6 to 11 mph in the morning.
Thursday Night
Mostly clear, with a low around 78. Southeast wind 6 to 13 mph, with gusts as high as 20 mph.
Friday
Sunny and hot, with a high near 100. South southeast wind 6 to 11 mph, with gusts as high as 20 mph.
Friday Night
Clear, with a low around 77. Southeast wind 6 to 14 mph, with gusts as high as 21 mph.
Saturday
Sunny, with a high near 99. Southeast wind 6 to 13 mph, with gusts as high as 21 mph.
Saturday Night
Mostly clear, with a low around 77. Southeast wind 6 to 14 mph, with gusts as high as 21 mph.
Sunday
Sunny, with a high near 98.
Sunday Night
Mostly clear, with a low around 78.
Monday
Sunny, with a high near 98.
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ABOUT THIS FORECAST

 
Point Forecast:
Harlingen TX
 26.19°N 97.7°W
Last Update:
12:20 am CDT Aug 5, 2025
Forecast Valid:
12am CDT Aug 5, 2025-6pm CDT Aug 11, 2025
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation