Port Allen, LA 70893 Frost Dates
Frost dates for Port Allen, LA, ZIP 70893
Typically, the last spring freeze lands around 02/28, roughly 184 days out. The first fall frost typically arrives around 11/26, about 272 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 Port Allen, not a forecast for this year.
What to do before the first frost
Zone 9a around Port Allen has about 13 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. 03/21 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Port Allen compares
About 272 days separate Port Allen's last and first frost, putting it 5,384 of 40,283 ZIP codes nationally. Within LA, it ranks 328 of 710.
Learn more
zone vs. frost date explains why Zone 9a and Port Allen's frost date answer different questions, and the frost range explains how to read the range around Port Allen's dates instead of trusting one.