Grand Isle, LA 70091 Frost Dates
When can you plant in Grand Isle, LA?
Typically, the last spring freeze lands around 01/23, roughly 148 days out. The first fall frost typically arrives around 01/09, about 357 frost-free days later.
Grand Isle sits in USDA Zone 10a (30 to 35°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
About 19 weeks of growing season left in Grand Isle before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Grand Isle's last frost
01/23 is the middle of 30 years of NOAA records, not a promise. Plant by 02/25 and you're betting against frost in roughly 9 years out of 10. 12/28 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Grand Isle compares
At roughly 357 frost-free days, Grand Isle places 2,095 of 40,283 ZIP codes in this dataset. Within LA, it ranks 2 of 710.
Learn more
zone vs. frost date covers why Zone 10a and Grand Isle's frost date answer different questions. the frost range covers how to read the range around Grand Isle's dates instead of trusting one.