Ionia, MO 65335 Frost Dates
When can you plant in Ionia, MO?
Around 04/13 is the usual last spring frost, about 228 days away. The first fall frost typically arrives around 10/23, about 191 frost-free days later.
The USDA Plant Hardiness Zone Map puts Ionia 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 8 weeks of growing season left in Ionia before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Ionia's last frost
04/13 is the middle of 30 years of NOAA records, not a promise. Plant by 03/29 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 Ionia compares
At roughly 191 frost-free days, Ionia places 20,949 of 40,283 ZIP codes in this dataset. Within MO, it ranks 766 of 1,129.
Learn more
zone vs. frost date covers why Zone 6b and Ionia's frost date answer different questions. the frost range covers how to read the range around Ionia's dates instead of trusting one.