Farmington, MO 63640 Frost Dates
Frost dates for Farmington, MO, ZIP 63640
The last spring frost here typically falls around 04/13, about 228 days from today. The first fall frost typically arrives around 10/21, about 191 frost-free days later.
The USDA Plant Hardiness Zone Map puts Farmington in Zone 6b (-5 to 0°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
Zone 6b around Farmington has about 8 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 04/13 isn't a guarantee
04/13 is the middle of 30 years of NOAA records, not a promise. Plant by 03/28 and you're betting against frost in roughly 9 years out of 10. 04/30 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Farmington compares
About 191 days separate Farmington's last and first frost, putting it 20,720 of 40,283 ZIP codes nationally. Within MO, it ranks 714 of 1,129.
Learn more
the frost range explains how to read the range around Farmington's dates instead of trusting one, and local microclimates explains what one yard in Farmington can differ from the 63640 normal.