Harlingen, TX Weather & Growing Conditions
Today
99°F
Sunny
Sunny, with a high near 99. Heat index values as high as 110. South southeast wind 13 to 20 mph, with gusts as high as 28 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 99°F | Sunny | 13 to 20 mph SSE | 2% |
| Tonight | 79°F | Mostly Clear | 9 to 18 mph SE | 1% |
| Wednesday | 99°F | Mostly Sunny | 9 to 17 mph SE | 2% |
| Wednesday Night | 79°F | Mostly Clear | 7 to 17 mph SE | 0% |
| Thursday | 100°F | Sunny | 7 to 17 mph SE | 12% |
| Thursday Night | 78°F | Mostly Clear | 6 to 17 mph SE | 12% |
| Friday | 98°F | Sunny then Slight Chance Showers And Thunderstorms | 5 to 16 mph SE | 20% |
| Friday Night | 77°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 2 to 16 mph SE | 20% |
| Saturday | 97°F | Sunny | 2 to 14 mph ESE | 14% |
| Saturday Night | 77°F | Mostly Clear | 3 to 14 mph SE | 14% |
| Sunday | 97°F | Sunny | 2 to 14 mph SE | 14% |
| Sunday Night | 78°F | Mostly Clear | 6 to 14 mph SE | 14% |
| Monday | 99°F | Sunny | 6 to 18 mph SSE | 4% |
| Monday Night | 78°F | Mostly Clear | 9 to 18 mph SSE | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Harlingen, TX
Last spring frost
Jan 8
First fall frost
Dec 29
Growing season
357 days
Hardiness zone
10a
Explore more for Harlingen, TX: full frost dates · planting calendar · Texas frost dates
Climate data from the nearest NOAA station, Harlingen Rio Grande Ap, Tx (2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.