Parnell, MO 64475 Frost Dates
Frost dates for Parnell, MO, ZIP 64475
Typically, the last spring freeze lands around 04/20, roughly 235 days out. The first fall frost typically arrives around 10/19, about 181 frost-free days later.
The USDA Plant Hardiness Zone Map puts Parnell in Zone 5b (-15 to -10°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 5b around Parnell has about 7 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.
How much risk comes with planting early here
04/20 is the middle of 30 years of NOAA records, not a promise. Plant by 04/05 and you're betting against frost in roughly 9 years out of 10. 05/06 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Parnell compares
Parnell's growing season runs about 181 days, ranking 24,737 of 40,283 US ZIP codes measured here, longest to shortest. Within MO, it ranks 1,000 of 1,129.
Learn more
local microclimates explains what one yard in Parnell can differ from the 64475 normal, and zone vs. frost date explains why Zone 5b and Parnell's frost date answer different questions.