Palmyra, MO 63461 Frost Dates
When can you plant in Palmyra, MO?
The last spring frost here typically falls around 04/10, about 225 days from today. The first fall frost typically arrives around 10/27, about 199 frost-free days later.
The USDA Plant Hardiness Zone Map puts Palmyra 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 9 weeks of growing season left in Palmyra 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
04/10 is the middle of 30 years of NOAA records, not a promise. Plant by 03/28 and you're betting against frost in roughly 9 years out of 10. 04/25 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Palmyra compares
Palmyra's growing season runs about 199 days, ranking 18,116 of 40,283 US ZIP codes measured here, longest to shortest. Within MO, it ranks 433 of 1,129.
Learn more
the frost range covers how to read the range around Palmyra's dates instead of trusting one. local microclimates covers what one yard in Palmyra can differ from the 63461 normal.