McCool, MS 39108 Frost Dates
Frost dates for McCool, MS, ZIP 39108
Around 03/21 is the usual last spring frost, about 205 days away. The first fall frost typically arrives around 11/13, about 235 frost-free days later.
McCool sits in USDA Zone 8a (10 to 15°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 8a around McCool 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 03/21 isn't a guarantee
03/21 is the middle of 30 years of NOAA records, not a promise. Plant by 03/01 and you're betting against frost in roughly 9 years out of 10. 04/09 is the safer bet, historically only a 1-in-10 chance of frost that late.
How McCool compares
McCool's growing season runs about 235 days, ranking 9,670 of 40,283 US ZIP codes measured here, longest to shortest. Within MS, it ranks 334 of 523.
Learn more
the frost range explains how to read the range around McCool's dates instead of trusting one, and local microclimates explains what one yard in McCool can differ from the 39108 normal.