Washington, LA 70589 Frost Dates
Frost dates for Washington, LA, ZIP 70589
The last spring frost here typically falls around 02/28, about 184 days from today. The first fall frost typically arrives around 11/23, about 267 frost-free days later.
The USDA Plant Hardiness Zone Map puts Washington in Zone 9a (20 to 25°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 9a around Washington has about 12 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
Why 02/28 isn't a guarantee
02/28 is the middle of 30 years of NOAA records, not a promise. Plant by 01/31 and you're betting against frost in roughly 9 years out of 10. 03/25 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Washington compares
At roughly 267 frost-free days, Washington places 5,888 of 40,283 ZIP codes in this dataset. Within LA, it ranks 456 of 710.
Learn more
local microclimates explains what one yard in Washington can differ from the 70589 normal, and zone vs. frost date explains why Zone 9a and Washington's frost date answer different questions.