Washington, LA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Washington, a town in St. Landry County, Louisiana.
Tonight
60°F
Patchy Fog
Patchy fog and showers and thunderstorms likely before 5am. Mostly cloudy, with a low around 60. Northwest wind 0 to 5 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Washington
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 60°F | Patchy Fog | 0 to 5 mph NW | 69% |
| Wednesday | 74°F | Mostly Sunny | 0 to 5 mph NW | 4% |
| Wednesday Night | 50°F | Mostly Clear | 0 mph | 0% |
| Thursday | 77°F | Sunny | 0 mph | 4% |
| Thursday Night | 55°F | Slight Chance Rain Showers | 0 mph | 22% |
| Friday | 77°F | Mostly Sunny | 0 to 5 mph N | 6% |
| Friday Night | 50°F | Mostly Clear | 5 mph N | 1% |
| Saturday | 72°F | Mostly Sunny | 5 to 10 mph N | 3% |
| Saturday Night | 44°F | Partly Cloudy | 5 mph N | 10% |
| Sunday | 67°F | Mostly Sunny | 5 to 10 mph N | 5% |
| Sunday Night | 41°F | Mostly Clear | 0 to 5 mph N | 3% |
| Monday | 70°F | Sunny | 0 to 5 mph N | 3% |
| Monday Night | 41°F | Mostly Clear | 0 mph | 3% |
| Tuesday | 73°F | Sunny | 0 to 5 mph NE | 1% |
Forecast source: National Weather Service (api.weather.gov) for Washington (30.616, -92.060). Updated through the day.
Growing snapshot for Washington
Last spring frost
Feb 28
First fall frost
Nov 23
Growing season
267 days
Hardiness zone
9a
More local growing data for Washington: nearby ZIP 70589 weather · frost dates · planting calendar · Louisiana frost dates
Nearby towns & communities
Arnaudville
Cankton
Grand Coteau
Krotz Springs
Lawtell
Lebeau
Leonville
Melville
Morrow
Opelousas
Palmetto
Port Barre
Sunset
Climate data from the nearest NOAA station, Grand Coteau, La (18.4 mi from Washington). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.