Brookhaven, MS 39603 Frost Dates
Frost dates for Brookhaven, MS, ZIP 39603
The last spring frost here typically falls around 03/17, about 201 days from today. The first fall frost typically arrives around 11/12, about 242 frost-free days later.
Zone 8b (15 to 20°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 Brookhaven, not a forecast for this year.
What to do before the first frost
Zone 8b around Brookhaven has about 11 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 03/17 isn't a guarantee
03/17 is the middle of 30 years of NOAA records, not a promise. Plant by 02/22 and you're betting against frost in roughly 9 years out of 10. 04/07 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Brookhaven compares
Brookhaven's growing season runs about 242 days, ranking 8,360 of 40,283 US ZIP codes measured here, longest to shortest. Within MS, it ranks 234 of 523.
Learn more
local microclimates explains what one yard in Brookhaven can differ from the 39603 normal, and zone vs. frost date explains why Zone 8b and Brookhaven's frost date answer different questions.