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New: October-December2026 Outlook - After a brutally hot and dry September, October brings the pattern change to wetter and less hot, with above average rainfall to close out 2026; flash flooding, water supply, & hazardous marine conditions in focus

Current conditions at

Harlingen, Rio Grande Valley International Airport (KHRL)

Lat: 26.23°NLon: 97.66°WElev: 33ft.

Mostly Cloudy

77°F

25°C

Humidity	96%
Wind Speed	N 10 mph
Barometer	29.95 in (1013.9 mb)
Dewpoint	76°F (24°C)
Visibility	10.00 mi
Heat Index	78°F (26°C)
Last update	4 Oct 1:52 pm CDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Harlingen, Rio Grande Valley International Airport TX

This Afternoon
High: 86 °F
Showers
Tonight
Low: 72 °F
Showers
Monday
High: 86 °F
Showers
Monday Night
Low: 71 °F
Showers
Likely
Tuesday
High: 89 °F
Showers
Likely
Tuesday Night
Low: 70 °F
Slight Chance
T-storms then
Slight Chance
Showers
Wednesday
High: 92 °F
Chance
Showers
Wednesday Night
Low: 72 °F
Partly Cloudy
then Slight
Chance
T-storms
Thursday
High: 91 °F
Showers
Likely

Detailed Forecast

This Afternoon

Showers and possibly a thunderstorm. High near 86. North northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

Tonight

Showers and possibly a thunderstorm. Low around 72. North wind 8 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.

Monday

Showers and thunderstorms likely, then showers and possibly a thunderstorm after 11am. High near 86. North wind around 15 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

Monday Night

Showers likely and possibly a thunderstorm before 7pm, then a chance of showers and thunderstorms between 7pm and 9pm, then showers likely and possibly a thunderstorm after 9pm. Mostly cloudy, with a low around 71. North wind 8 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 70%.

Tuesday

Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 89. North wind 13 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.

Tuesday Night

A slight chance of showers and thunderstorms before 7pm, then a slight chance of showers between 7pm and 1am. Partly cloudy, with a low around 70. North northeast wind 5 to 10 mph. Chance of precipitation is 20%.

Wednesday

A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Sunny, with a high near 92. North northeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.

Wednesday Night

A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 72. Northeast wind 5 to 10 mph becoming light north northeast. Winds could gust as high as 20 mph.

Thursday

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 91. North northeast wind 10 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.

Thursday Night

A chance of showers and thunderstorms. Partly cloudy, with a low around 71. North northeast wind 6 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

Friday

A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 91. North northwest wind 10 to 15 mph, with gusts as high as 29 mph.

Friday Night

A 20 percent chance of showers. Partly cloudy, with a low around 69.

Saturday

Mostly sunny, with a high near 91.