Picayune, MS 39457 Frost Dates
Frost dates for Picayune, MS, ZIP 39457
Around 03/09 is the usual last spring frost, about 193 days away. The first fall frost typically arrives around 11/18, about 255 frost-free days later.
Picayune sits in USDA Zone 9a (20 to 25°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 9a around Picayune has about 12 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
03/09 is the middle of 30 years of NOAA records, not a promise. Plant by 02/17 and you're betting against frost in roughly 9 years out of 10. 03/31 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Picayune compares
At roughly 255 frost-free days, Picayune places 6,907 of 40,283 ZIP codes in this dataset. Within MS, it ranks 91 of 523.
Learn more
zone vs. frost date explains why Zone 9a and Picayune's frost date answer different questions, and the frost range explains how to read the range around Picayune's dates instead of trusting one.