Grant City, MO 64420 Frost Dates
When can you plant in Grant City, MO?
Typically, the last spring freeze lands around 04/24, roughly 239 days out. The first fall frost typically arrives around 10/14, about 172 frost-free days later.
Grant City sits in USDA Zone 5b (-15 to -10°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
About 7 weeks of growing season left in Grant City before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
04/24 is the middle of 30 years of NOAA records, not a promise. Plant by 04/11 and you're betting against frost in roughly 9 years out of 10. 05/07 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Grant City compares
About 172 days separate Grant City's last and first frost, putting it 28,415 of 40,283 ZIP codes nationally. Within MO, it ranks 1,096 of 1,129.
Learn more
local microclimates covers what one yard in Grant City can differ from the 64420 normal. zone vs. frost date covers why Zone 5b and Grant City's frost date answer different questions.