Harlingen, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Harlingen, a city in Cameron County, Texas.
Today
100°F
Sunny
Sunny, with a high near 100. Heat index values as high as 109. South southeast wind 10 to 17 mph, with gusts as high as 29 mph.
7-day forecast for Harlingen
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 100°F | Sunny | 10 to 17 mph SSE | 2% |
| Tonight | 80°F | Mostly Clear | 9 to 16 mph SE | 1% |
| Wednesday | 100°F | Mostly Sunny | 9 to 15 mph SE | 2% |
| Wednesday Night | 80°F | Mostly Clear | 6 to 15 mph SE | 0% |
| Thursday | 100°F | Sunny | 6 to 15 mph SE | 11% |
| Thursday Night | 79°F | Mostly Clear | 5 to 15 mph SE | 11% |
| Friday | 99°F | Sunny then Slight Chance Showers And Thunderstorms | 5 to 13 mph SE | 20% |
| Friday Night | 78°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 2 to 14 mph SE | 20% |
| Saturday | 98°F | Sunny | 2 to 13 mph ESE | 14% |
| Saturday Night | 78°F | Mostly Clear | 3 to 13 mph SE | 14% |
| Sunday | 98°F | Sunny then Slight Chance Showers And Thunderstorms | 2 to 13 mph SE | 15% |
| Sunday Night | 79°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 6 to 14 mph SE | 15% |
| Monday | 99°F | Sunny | 6 to 17 mph SSE | 4% |
| Monday Night | 80°F | Mostly Clear | 10 to 17 mph SSE | 4% |
Forecast source: National Weather Service (api.weather.gov) for Harlingen (26.191, -97.697). Updated through the day.
Growing snapshot for Harlingen
Last spring frost
Jan 9
First fall frost
Jan 3
Growing season
365 days
Hardiness zone
10a
More local growing data for Harlingen: nearby ZIP 78552 weather · frost dates · planting calendar · Texas frost dates
Nearby towns & communities
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Cameron Park
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Combes
Del Mar Heights
El Camino Angosto
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Green Valley Farms
Iglesia Antigua
Indian Lake
Juarez
La Feria
La Feria North
La Paloma
La Tina Ranch
Lago
Laguna Heights
Laguna Vista
Las Palmas II
Lasana
Laureles
Los Fresnos
Los Indios
Lozano
Olmito
Climate data from the nearest NOAA station, Harlingen, Tx (4.9 mi from Harlingen). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.