Grand Isle, LA 70050 Frost Dates
Grand Isle, LA: when does the frost end?
Typically, the last spring freeze lands around 01/25, roughly 150 days out. Fall's first freeze usually shows up around 01/04, roughly 346 days after the last spring frost.
Zone 10a (30 to 35°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 Isle, not a forecast for this year.
Stretching the season past the first frost
With roughly 18 weeks until Grand Isle's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Grand Isle's last frost
01/25 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/21 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/31 and only about 1 year in 10 sees frost after that.
Grand Isle against the rest of the dataset
At roughly 346 frost-free days, Grand Isle places 2,452 of 40,283 ZIP codes in this dataset. Within LA, it ranks 12 of 710.
Learn more
Before leaning on 70050's figures: zone vs. frost date explains why Zone 10a and Grand Isle's frost date answer different questions, while the frost range explains how to read the range around Grand Isle's dates instead of trusting one.