Hahnville, LA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hahnville, a community in St. Charles County, Louisiana.
Overnight
68°F
Patchy Fog
Patchy fog. Partly cloudy. Low around 68, with temperatures rising to around 70 overnight. South wind around 5 mph.
7-day forecast for Hahnville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 68°F | Patchy Fog | 5 mph S | 4% |
| Wednesday | 81°F | Chance Rain Showers then Mostly Sunny | 0 to 5 mph W | 25% |
| Wednesday Night | 59°F | Mostly Clear | 0 to 5 mph NW | 0% |
| Thursday | 80°F | Sunny | 0 to 5 mph N | 0% |
| Thursday Night | 61°F | Partly Cloudy | 0 to 5 mph NW | 4% |
| Friday | 79°F | Mostly Sunny | 5 mph N | 6% |
| Friday Night | 58°F | Mostly Clear | 0 to 10 mph N | 0% |
| Saturday | 74°F | Mostly Sunny | 5 to 10 mph NE | 1% |
| Saturday Night | 52°F | Partly Cloudy | 5 to 10 mph N | 2% |
| Sunday | 68°F | Slight Chance Rain Showers then Mostly Sunny | 5 to 10 mph N | 15% |
| Sunday Night | 49°F | Partly Cloudy | 5 mph N | 5% |
| Monday | 69°F | Sunny | 0 to 10 mph N | 6% |
| Monday Night | 49°F | Mostly Clear | 0 to 5 mph N | 5% |
| Tuesday | 72°F | Sunny | 0 to 5 mph NE | 5% |
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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Des Allemands
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Montz
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Norco
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 Nov 4, 2026.