Hahnville, LA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hahnville, a community in St. Charles County, Louisiana.
Today
94°F
Sunny
Sunny. High near 94, with temperatures falling to around 92 in the afternoon. Northwest wind 0 to 5 mph.
7-day forecast for Hahnville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 94°F | Sunny | 0 to 5 mph NW | 10% |
| Tonight | 77°F | Mostly Clear | 0 to 5 mph SW | 7% |
| Wednesday | 95°F | Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 35% |
| Wednesday Night | 76°F | Mostly Clear | 0 to 5 mph SW | 7% |
| Thursday | 94°F | Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SE | 36% |
| Thursday Night | 76°F | Chance Showers And Thunderstorms then Mostly Clear | 0 to 5 mph SE | 36% |
| Friday | 93°F | Sunny then Chance Showers And Thunderstorms | 0 to 5 mph E | 26% |
| Friday Night | 77°F | Chance Showers And Thunderstorms | 0 to 5 mph E | 26% |
| Saturday | 93°F | Chance Showers And Thunderstorms | 0 to 5 mph E | 41% |
| Saturday Night | 76°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph E | 41% |
| Sunday | 92°F | Showers And Thunderstorms Likely | 0 to 5 mph E | 62% |
| Sunday Night | 76°F | Showers And Thunderstorms Likely | 0 to 5 mph SE | 62% |
| Monday | 92°F | Showers And Thunderstorms Likely | 0 to 5 mph SE | 68% |
| Monday Night | 76°F | Showers And Thunderstorms Likely | 0 to 5 mph S | 68% |
Forecast source: National Weather Service (api.weather.gov) for Hahnville (29.961, -90.424). Updated through the day.
Growing snapshot for Hahnville
Last spring frost
Feb 9
First fall frost
Dec 14
Growing season
308 days
Hardiness zone
9b
More local growing data for Hahnville: nearby ZIP 70057 weather · frost dates · planting calendar · Louisiana frost dates
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Paradis
St. Rose
Taft
Climate data from the nearest NOAA station, Reserve, La (9.5 mi from Hahnville). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.