Romeville, LA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Romeville, a community in St. James County, Louisiana.
This Afternoon
91°F
Sunny
Sunny. High near 91, with temperatures falling to around 89 in the afternoon. East wind around 5 mph.
7-day forecast for Romeville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 91°F | Sunny | 5 mph E | 0% |
| Tonight | 71°F | Clear | 0 mph | 0% |
| Saturday | 94°F | Sunny | 0 to 5 mph NE | 2% |
| Saturday Night | 73°F | Clear | 0 mph | 2% |
| Sunday | 95°F | Sunny | 0 mph | 10% |
| Sunday Night | 75°F | Mostly Clear | 0 mph | 10% |
| Monday | 95°F | Sunny then Chance Showers And Thunderstorms | 0 to 5 mph N | 33% |
| Monday Night | 74°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 33% |
| Tuesday | 95°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph NE | 15% |
| Tuesday Night | 74°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 mph | 15% |
| Wednesday | 94°F | Sunny | 0 to 5 mph NE | 13% |
| Wednesday Night | 73°F | Mostly Clear | 0 to 5 mph NE | 13% |
| Thursday | 91°F | Sunny | 5 to 10 mph NE | 9% |
| Thursday Night | 71°F | Mostly Clear | 0 to 5 mph NE | 9% |
Forecast source: National Weather Service (api.weather.gov) for Romeville (30.069, -90.827). Updated through the day.
Growing snapshot for Romeville
Last spring frost
Feb 21
First fall frost
Dec 5
Growing season
291 days
Hardiness zone
9a
More local growing data for Romeville: nearby ZIP 70723 weather · frost dates · planting calendar · Louisiana frost dates
Nearby towns & communities
Convent
Gramercy
Grand Point
Hester
Kraemer
Lutcher
Moonshine
North Vacherie
Paulina
Pleasure Bend
South Vacherie
St. James
Union
Welcome
Climate data from the nearest NOAA station, Donaldsonville 4 Sw, La (11.2 mi from Romeville). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.