St. James, LA Weather & Growing Conditions
This Afternoon
84°F
Mostly Sunny
Mostly sunny. High near 84, with temperatures falling to around 76 in the afternoon. Southeast wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 84°F | Mostly Sunny | 5 mph SE | 8% |
| Tonight | 67°F | Mostly Cloudy then Patchy Fog | 0 mph | 13% |
| Wednesday | 80°F | Patchy Fog then Mostly Sunny | 0 to 5 mph NW | 16% |
| Wednesday Night | 57°F | Mostly Clear | 0 mph | 1% |
| Thursday | 81°F | Sunny | 0 mph | 10% |
| Thursday Night | 60°F | Chance Rain Showers | 0 mph | 30% |
| Friday | 79°F | Chance Rain Showers | 0 to 5 mph N | 33% |
| Friday Night | 54°F | Partly Cloudy | 0 to 5 mph N | 4% |
| Saturday | 75°F | Mostly Sunny | 5 mph N | 6% |
| Saturday Night | 49°F | Partly Cloudy | 0 to 5 mph N | 13% |
| Sunday | 69°F | Slight Chance Rain Showers then Mostly Sunny | 5 mph N | 15% |
| Sunday Night | 45°F | Mostly Clear | 0 to 5 mph N | 5% |
| Monday | 71°F | Sunny | 0 to 5 mph NE | 3% |
| Monday Night | 45°F | Mostly Clear | 0 mph | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for St. James, LA
Last spring frost
Feb 21
First fall frost
Dec 5
Growing season
291 days
Hardiness zone
9a
Explore more for St. James, LA: full frost dates · planting calendar · Louisiana frost dates
Climate data from the nearest NOAA station, Donaldsonville 4 Sw, La (10 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.