Harahan, LA 70005 Frost Dates
When can you plant in Harahan, LA?
The last spring frost here typically falls around 01/24, about 149 days from today. The first fall frost typically arrives around 01/02, about 341 frost-free days later.
Harahan sits in USDA Zone 9b (25 to 30°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 18 weeks of growing season left in Harahan before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
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 2,605 of 40,283 US ZIP codes measured here, longest to shortest. Within LA, it ranks 15 of 710.
Learn more
zone vs. frost date covers why Zone 9b and Harahan's frost date answer different questions. the frost range covers how to read the range around Harahan's dates instead of trusting one.