Hayti, MO 63851 Frost Dates
When can you plant in Hayti, MO?
Typically, the last spring freeze lands around 03/24, roughly 208 days out. The first fall frost typically arrives around 11/09, about 230 frost-free days later.
Zone 7b (5 to 10°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 Hayti, not a forecast for this year.
What to do before the first frost
About 10 weeks of growing season left in Hayti before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 03/24 isn't a guarantee
03/24 is the middle of 30 years of NOAA records, not a promise. Plant by 03/07 and you're betting against frost in roughly 9 years out of 10. 04/08 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Hayti compares
About 230 days separate Hayti's last and first frost, putting it 10,417 of 40,283 ZIP codes nationally. Within MO, it ranks 4 of 1,129.
Learn more
zone vs. frost date covers why Zone 7b and Hayti's frost date answer different questions. the frost range covers how to read the range around Hayti's dates instead of trusting one.