Winona, MO 65588 Frost Dates
When can you plant in Winona, MO?
Around 04/22 is the usual last spring frost, about 237 days away. The first fall frost typically arrives around 10/18, about 176 frost-free days later.
The USDA Plant Hardiness Zone Map puts Winona in Zone 6b (-5 to 0°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 Winona before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/22 isn't a guarantee
04/22 is the middle of 30 years of NOAA records, not a promise. Plant by 04/08 and you're betting against frost in roughly 9 years out of 10. 05/06 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Winona compares
About 176 days separate Winona's last and first frost, putting it 26,545 of 40,283 ZIP codes nationally. Within MO, it ranks 1,060 of 1,129.
Learn more
local microclimates covers what one yard in Winona can differ from the 65588 normal. zone vs. frost date covers why Zone 6b and Winona's frost date answer different questions.