St. James, LA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. James, a community in St. James County, Louisiana.
Tonight
71°F
Clear
Clear, with a low around 71. East wind around 0 mph.
7-day forecast for St. James
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 71°F | Clear | 0 mph | 0% |
| Saturday | 94°F | Sunny | 0 to 5 mph NE | 2% |
| Saturday Night | 72°F | Clear | 0 mph | 2% |
| Sunday | 95°F | Sunny | 0 mph | 14% |
| Sunday Night | 75°F | Mostly Clear | 0 mph | 14% |
| Monday | 95°F | Sunny then Chance Showers And Thunderstorms | 0 to 5 mph N | 34% |
| Monday Night | 74°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 mph | 34% |
| Tuesday | 95°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph NE | 16% |
| Tuesday Night | 74°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 mph | 16% |
| Wednesday | 94°F | Sunny | 0 to 5 mph NE | 14% |
| Wednesday Night | 73°F | Mostly Clear | 0 to 5 mph NE | 14% |
| Thursday | 91°F | Sunny | 5 to 10 mph NE | 9% |
| Thursday Night | 71°F | Mostly Clear | 0 to 5 mph NE | 9% |
| Friday | 89°F | Sunny | 5 to 10 mph NE | 4% |
Forecast source: National Weather Service (api.weather.gov) for St. James (30.019, -90.851). Updated through the day.
Growing snapshot for St. James
Last spring frost
Feb 21
First fall frost
Dec 5
Growing season
291 days
Hardiness zone
9a
More local growing data for St. James: nearby ZIP 70086 weather · frost dates · planting calendar · Louisiana frost dates
Nearby towns & communities
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Kraemer
Lutcher
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North Vacherie
Paulina
Pleasure Bend
Romeville
South Vacherie
Union
Welcome
Climate data from the nearest NOAA station, Donaldsonville 4 Sw, La (10 mi from St. James). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.