Cosby, MO 64436 Frost Dates
64436, near Cosby, MO: the frost window
Around 04/17 is the usual last spring frost, about 232 days away. Fall's first freeze usually shows up around 10/19, roughly 184 days after the last spring frost.
Zone 6a (-10 to -5°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 Cosby, not a forecast for this year.
Stretching the season past the first frost
Cosby's growing season runs out in roughly 7 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/17 isn't a guarantee
04/17 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/03 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/01 and only about 1 year in 10 sees frost after that.
Cosby against the rest of the dataset
Cosby's growing season runs about 184 days, ranking 23,686 of 40,283 US ZIP codes measured here, longest to shortest. Within MO, it ranks 942 of 1,129.
Learn more
Two guides worth reading on 64436: the frost range, on how to read the range around Cosby's dates instead of trusting one, and local microclimates, on what one yard in Cosby can differ from the 64436 normal.