Grand Coteau, LA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grand Coteau, a town in St. Landry County, Louisiana.
Overnight
62°F
Mostly Cloudy
Mostly cloudy, with a low around 62. North wind around 5 mph. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Grand Coteau
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 62°F | Mostly Cloudy | 5 mph N | 12% |
| Wednesday | 75°F | Mostly Sunny | 5 to 10 mph N | 4% |
| Wednesday Night | 50°F | Mostly Clear | 0 mph | 0% |
| Thursday | 77°F | Sunny | 0 mph | 0% |
| Thursday Night | 54°F | Partly Cloudy | 0 mph | 4% |
| Friday | 79°F | Sunny | 0 to 10 mph N | 1% |
| Friday Night | 52°F | Mostly Clear | 5 mph NE | 1% |
| Saturday | 72°F | Mostly Sunny | 5 to 10 mph NE | 1% |
| Saturday Night | 46°F | Partly Cloudy | 5 to 10 mph N | 3% |
| Sunday | 66°F | Mostly Sunny then Slight Chance Rain Showers | 5 to 10 mph N | 15% |
| Sunday Night | 43°F | Partly Cloudy | 0 to 5 mph N | 4% |
| Monday | 69°F | Sunny | 5 mph N | 3% |
| Monday Night | 43°F | Mostly Clear | 0 mph | 1% |
| Tuesday | 73°F | Sunny | 0 to 5 mph N | 3% |
Forecast source: National Weather Service (api.weather.gov) for Grand Coteau (30.420, -92.044). Updated through the day.
Growing snapshot for Grand Coteau
Last spring frost
Feb 28
First fall frost
Nov 23
Growing season
267 days
Hardiness zone
9a
More local growing data for Grand Coteau: nearby ZIP 70541 weather · frost dates · planting calendar · Louisiana frost dates
Nearby towns & communities
Arnaudville
Cankton
Krotz Springs
Lawtell
Lebeau
Leonville
Melville
Morrow
Opelousas
Palmetto
Port Barre
Sunset
Washington
Climate data from the nearest NOAA station, Grand Coteau, La (0.2 mi from Grand Coteau). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.