Slidell, LA 70458 Frost Dates
Frost dates for Slidell, LA, ZIP 70458
Typically, the last spring freeze lands around 02/24, roughly 180 days out. The first fall frost typically arrives around 12/01, about 281 frost-free days later.
Slidell sits in USDA Zone 9a (20 to 25°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
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
About 281 days separate Slidell's last and first frost, putting it 4,783 of 40,283 ZIP codes nationally. Within LA, it ranks 245 of 710.
Learn more
zone vs. frost date explains why Zone 9a and Slidell's frost date answer different questions, and the frost range explains how to read the range around Slidell's dates instead of trusting one.