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
74°F
Mostly Clear
Mostly clear, with a low around 74. Wind around 0 mph.
7-day forecast for Grand Coteau
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 74°F | Mostly Clear | 0 mph | 0% |
| Tuesday | 94°F | Sunny then Slight Chance Showers And Thunderstorms | 0 mph | 20% |
| Tuesday Night | 76°F | Mostly Clear | 0 mph | 12% |
| Wednesday | 95°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph SW | 16% |
| Wednesday Night | 75°F | Mostly Clear | 0 to 5 mph SW | 9% |
| Thursday | 94°F | Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SW | 34% |
| Thursday Night | 74°F | Chance Showers And Thunderstorms then Mostly Clear | 0 to 5 mph E | 34% |
| Friday | 94°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph SE | 22% |
| Friday Night | 74°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 to 5 mph S | 22% |
| Saturday | 94°F | Sunny then Chance Showers And Thunderstorms | 0 to 5 mph E | 26% |
| Saturday Night | 75°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph SE | 26% |
| Sunday | 93°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SE | 51% |
| Sunday Night | 75°F | Chance Showers And Thunderstorms | 0 to 5 mph E | 51% |
| Monday | 93°F | Showers And Thunderstorms Likely | 0 to 5 mph S | 58% |
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 Aug 4, 2026.