Grand Coteau, LA 70541 Frost Dates
Frost dates for Grand Coteau, LA, ZIP 70541
Around 02/28 is the usual last spring frost, about 184 days away. The first fall frost typically arrives around 11/23, about 267 frost-free days later.
Zone 9a (20 to 25°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Grand Coteau, not a forecast for this year.
What to do before the first frost
Zone 9a around Grand Coteau 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.
How much risk comes with planting early here
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 Grand Coteau compares
Grand Coteau's growing season runs about 267 days, ranking 5,886 of 40,283 US ZIP codes measured here, longest to shortest. Within LA, it ranks 454 of 710.
Learn more
local microclimates explains what one yard in Grand Coteau can differ from the 70541 normal, and zone vs. frost date explains why Zone 9a and Grand Coteau's frost date answer different questions.