Harahan, LA 70094 Frost Dates
Frost dates for Harahan, LA, ZIP 70094
Around 01/24 is the usual last spring frost, about 149 days away. The first fall frost typically arrives around 01/02, about 341 frost-free days later.
The USDA Plant Hardiness Zone Map puts Harahan in Zone 9b (25 to 30°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 9b around Harahan has about 18 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
01/24 is the middle of 30 years of NOAA records, not a promise. Plant by 02/23 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 Harahan compares
Harahan's growing season runs about 341 days, ranking 2,606 of 40,283 US ZIP codes measured here, longest to shortest. Within LA, it ranks 16 of 710.
Learn more
zone vs. frost date explains why Zone 9b and Harahan's frost date answer different questions, and the frost range explains how to read the range around Harahan's dates instead of trusting one.