Slidell, LA 70461 Frost Dates
Frost dates for Slidell, LA, ZIP 70461
Around 02/24 is the usual last spring frost, about 180 days away. The first fall frost typically arrives around 12/01, about 281 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 Slidell, not a forecast for this year.
What to do before the first frost
Zone 9a around Slidell has about 14 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
02/24 is the middle of 30 years of NOAA records, not a promise. Plant by 01/29 and you're betting against frost in roughly 9 years out of 10. 03/19 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Slidell compares
Slidell's growing season runs about 281 days, ranking 4,784 of 40,283 US ZIP codes measured here, longest to shortest. Within LA, it ranks 246 of 710.
Learn more
local microclimates explains what one yard in Slidell can differ from the 70461 normal, and zone vs. frost date explains why Zone 9a and Slidell's frost date answer different questions.