Port Gibson, MS 39086 Frost Dates
When can you plant in Port Gibson, MS?
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 241 frost-free days later.
The USDA Plant Hardiness Zone Map puts Port Gibson in Zone 8b (15 to 20°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
About 11 weeks of growing season left in Port Gibson before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Port Gibson's last frost
03/17 is the middle of 30 years of NOAA records, not a promise. Plant by 02/24 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 Port Gibson compares
Port Gibson's growing season runs about 241 days, ranking 8,589 of 40,283 US ZIP codes measured here, longest to shortest. Within MS, it ranks 252 of 523.
Learn more
zone vs. frost date covers why Zone 8b and Port Gibson's frost date answer different questions. the frost range covers how to read the range around Port Gibson's dates instead of trusting one.