Donaldsonville, LA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Donaldsonville, a city in Ascension County, Louisiana.
Overnight
67°F
Chance Rain Showers
Patchy fog before 5am, then a chance of rain showers and patchy fog. Mostly cloudy. Low around 67, with temperatures rising to around 70 overnight. Southwest wind around 0 mph. Chance of precipitation is 30%.
7-day forecast for Donaldsonville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 67°F | Chance Rain Showers | 0 mph | 25% |
| Wednesday | 79°F | Patchy Fog then Mostly Sunny | 0 to 5 mph NW | 23% |
| Wednesday Night | 54°F | Mostly Clear then Patchy Fog | 0 mph | 0% |
| Thursday | 80°F | Sunny | 0 mph | 0% |
| Thursday Night | 60°F | Partly Cloudy | 0 mph | 5% |
| Friday | 79°F | Mostly Sunny | 0 to 5 mph N | 5% |
| Friday Night | 55°F | Mostly Clear | 0 to 5 mph N | 0% |
| Saturday | 75°F | Mostly Sunny | 5 mph NE | 1% |
| Saturday Night | 49°F | Partly Cloudy | 5 mph N | 3% |
| Sunday | 68°F | Slight Chance Rain Showers | 5 mph N | 15% |
| Sunday Night | 45°F | Slight Chance Rain Showers then Partly Cloudy | 0 to 5 mph N | 15% |
| Monday | 70°F | Sunny | 0 to 5 mph N | 5% |
| Monday Night | 45°F | Mostly Clear | 0 mph | 5% |
| Tuesday | 73°F | Sunny | 0 to 5 mph NE | 5% |
Forecast source: National Weather Service (api.weather.gov) for Donaldsonville (30.095, -90.993). Updated through the day.
Growing snapshot for Donaldsonville
Last spring frost
Feb 21
First fall frost
Dec 5
Growing season
291 days
Hardiness zone
9a
More local growing data for Donaldsonville: nearby ZIP 70346 weather · frost dates · planting calendar · Louisiana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Donaldsonville 4 Sw, La (2.4 mi from Donaldsonville). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.