Harahan, LA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Harahan, a city in Jefferson County, Louisiana.
Tonight
75°F
Clear
Clear. Low around 75, with temperatures rising to around 77 overnight. Southeast wind 0 to 5 mph.
7-day forecast for Harahan
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 75°F | Clear | 0 to 5 mph SE | 0% |
| Saturday | 93°F | Sunny | 0 to 5 mph NE | 3% |
| Saturday Night | 76°F | Clear | 0 to 5 mph S | 2% |
| Sunday | 94°F | Sunny | 0 to 5 mph N | 5% |
| Sunday Night | 77°F | Mostly Clear | 0 mph | 5% |
| Monday | 93°F | Sunny then Slight Chance Showers And Thunderstorms | 5 mph N | 21% |
| Monday Night | 77°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph S | 21% |
| Tuesday | 93°F | Sunny | 0 to 5 mph NE | 13% |
| Tuesday Night | 78°F | Mostly Clear | 0 to 5 mph NE | 13% |
| Wednesday | 92°F | Sunny | 5 to 10 mph NE | 11% |
| Wednesday Night | 77°F | Mostly Clear | 0 to 10 mph NE | 11% |
| Thursday | 90°F | Sunny | 10 to 15 mph NE | 9% |
| Thursday Night | 76°F | Mostly Clear | 5 to 10 mph NE | 9% |
| Friday | 88°F | Sunny | 10 to 15 mph NE | 5% |
Forecast source: National Weather Service (api.weather.gov) for Harahan (29.936, -90.203). Updated through the day.
Growing snapshot for Harahan
Last spring frost
Jan 30
First fall frost
Dec 31
Growing season
333 days
Hardiness zone
9b
More local growing data for Harahan: nearby ZIP 70123 weather · frost dates · planting calendar · Louisiana frost dates
Nearby towns & communities
Avondale
Barataria
Belle Chasse
Bridge City
Elmwood
Estelle
Grand Isle
Gretna
Harvey
Jean Lafitte
Jefferson
Kenner
Lafitte
Metairie
New Orleans Station
River Ridge
Terrytown
Timberlane
Waggaman
Woodmere
Climate data from the nearest NOAA station, New Orleans Intl Ap, La (4 mi from Harahan). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.