Cosby, MO 64459 Frost Dates
When can you plant in Cosby, MO?
Typically, the last spring freeze lands around 04/17, roughly 232 days out. The first fall frost typically arrives around 10/19, about 184 frost-free days later.
The USDA Plant Hardiness Zone Map puts Cosby in Zone 6a (-10 to -5°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
About 7 weeks of growing season left in Cosby before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Cosby's last frost
04/17 is the middle of 30 years of NOAA records, not a promise. Plant by 04/03 and you're betting against frost in roughly 9 years out of 10. 05/01 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Cosby compares
Cosby's growing season runs about 184 days, ranking 23,687 of 40,283 US ZIP codes measured here, longest to shortest. Within MO, it ranks 943 of 1,129.
Learn more
the frost range covers how to read the range around Cosby's dates instead of trusting one. local microclimates covers what one yard in Cosby can differ from the 64459 normal.