Hahnville, LA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hahnville, a community in St. Charles County, Louisiana.
Today
93°F
Sunny
Sunny. High near 93, with temperatures falling to around 91 in the afternoon. Northeast wind 0 to 5 mph.
7-day forecast for Hahnville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 93°F | Sunny | 0 to 5 mph NE | 2% |
| Tonight | 74°F | Clear | 0 to 5 mph S | 1% |
| Sunday | 94°F | Sunny | 0 to 5 mph N | 7% |
| Sunday Night | 75°F | Mostly Clear | 0 mph | 3% |
| Monday | 93°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph N | 16% |
| Monday Night | 75°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 mph | 16% |
| Tuesday | 93°F | Sunny | 0 to 5 mph N | 12% |
| Tuesday Night | 76°F | Mostly Clear | 0 to 5 mph E | 12% |
| Wednesday | 92°F | Sunny | 0 to 10 mph NE | 8% |
| Wednesday Night | 75°F | Mostly Clear | 0 to 5 mph NE | 8% |
| Thursday | 90°F | Sunny | 10 mph NE | 6% |
| Thursday Night | 74°F | Mostly Clear | 5 to 10 mph NE | 6% |
| Friday | 88°F | Sunny | 5 to 10 mph NE | 4% |
| Friday Night | 73°F | Mostly Clear | 0 to 5 mph E | 4% |
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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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 Sep 19, 2026.