Harman US

Washington, LA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Washington, a town in St. Landry County, Louisiana.

This Afternoon
96°F
Sunny
Sunny, with a high near 96. Heat index values as high as 102. Southeast wind around 5 mph.

7-day forecast for Washington

WhenTempForecastWindPrecip
This Afternoon 96°F Sunny 5 mph SE 0%
Tonight 72°F Clear 0 to 5 mph S 0%
Sunday 97°F Sunny 0 to 5 mph SE 1%
Sunday Night 74°F Mostly Clear 0 to 5 mph SW 4%
Monday 98°F Sunny 0 to 5 mph N 7%
Monday Night 74°F Mostly Clear 0 mph 7%
Tuesday 99°F Sunny 0 to 5 mph N 10%
Tuesday Night 74°F Mostly Clear 0 to 5 mph N 10%
Wednesday 97°F Sunny 0 to 10 mph NE 4%
Wednesday Night 73°F Mostly Clear 0 to 5 mph NE 4%
Thursday 96°F Sunny 5 to 10 mph NE 1%
Thursday Night 70°F Mostly Clear 0 to 5 mph NE 1%
Friday 95°F Sunny 5 to 10 mph NE 1%
Friday Night 69°F Partly Cloudy 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

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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 Sep 19, 2026.