Osborn, MO 64474 Frost Dates
When can you plant in Osborn, MO?
Around 04/15 is the usual last spring frost, about 230 days away. The first fall frost typically arrives around 10/24, about 192 frost-free days later.
The USDA Plant Hardiness Zone Map puts Osborn 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 8 weeks of growing season left in Osborn 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
04/15 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. 04/29 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Osborn compares
At roughly 192 frost-free days, Osborn places 20,546 of 40,283 ZIP codes in this dataset. Within MO, it ranks 704 of 1,129.
Learn more
the frost range covers how to read the range around Osborn's dates instead of trusting one. local microclimates covers what one yard in Osborn can differ from the 64474 normal.