Grand Isle, LA 70038 Frost Dates
70038, near Grand Isle, LA: the frost window
Around 01/23 is the usual last spring frost, about 148 days away. Fall's first freeze usually shows up around 01/09, roughly 357 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
Grand Isle's growing season runs out in roughly 19 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
01/23 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/25 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/28 and only about 1 year in 10 sees frost after that.
Grand Isle against the rest of the dataset
At roughly 357 frost-free days, Grand Isle places 2,094 of 40,283 ZIP codes in this dataset. Within LA, it ranks 1 of 710.
Learn more
Two guides worth reading on 70038: the frost range, on how to read the range around Grand Isle's dates instead of trusting one, and local microclimates, on what one yard in Grand Isle can differ from the 70038 normal.