Sulphur, LA 70665 Frost Dates
Frost dates for Sulphur, LA, ZIP 70665
Typically, the last spring freeze lands around 02/14, roughly 170 days out. The first fall frost typically arrives around 12/07, about 299 frost-free days later.
Sulphur 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
Zone 9b around Sulphur has about 14 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.
Why 02/14 isn't a guarantee
02/14 is the middle of 30 years of NOAA records, not a promise. Plant by 01/16 and you're betting against frost in roughly 9 years out of 10. 03/11 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Sulphur compares
About 299 days separate Sulphur's last and first frost, putting it 4,159 of 40,283 ZIP codes nationally. Within LA, it ranks 182 of 710.
Learn more
zone vs. frost date explains why Zone 9b and Sulphur's frost date answer different questions, and the frost range explains how to read the range around Sulphur's dates instead of trusting one.