Jonestown, MS 38639 Frost Dates
Frost dates for Jonestown, MS, ZIP 38639
The last spring frost here typically falls around 03/16, about 200 days from today. The first fall frost typically arrives around 11/12, about 243 frost-free days later.
Zone 8a (10 to 15°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 Jonestown, not a forecast for this year.
What to do before the first frost
Zone 8a around Jonestown 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 03/16 isn't a guarantee
03/16 is the middle of 30 years of NOAA records, not a promise. Plant by 02/26 and you're betting against frost in roughly 9 years out of 10. 04/02 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Jonestown compares
Jonestown's growing season runs about 243 days, ranking 8,318 of 40,283 US ZIP codes measured here, longest to shortest. Within MS, it ranks 221 of 523.
Learn more
zone vs. frost date explains why Zone 8a and Jonestown's frost date answer different questions, and the frost range explains how to read the range around Jonestown's dates instead of trusting one.