Alma, MO 64001 Frost Dates
Frost dates for Alma, MO, ZIP 64001
Around 04/06 is the usual last spring frost, about 221 days away. The first fall frost typically arrives around 10/30, about 207 frost-free days later.
The USDA Plant Hardiness Zone Map puts Alma 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
Zone 6b around Alma has about 9 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
04/06 is the middle of 30 years of NOAA records, not a promise. Plant by 03/21 and you're betting against frost in roughly 9 years out of 10. 04/23 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Alma compares
Alma's growing season runs about 207 days, ranking 15,872 of 40,283 US ZIP codes measured here, longest to shortest. Within MO, it ranks 209 of 1,129.
Learn more
local microclimates explains what one yard in Alma can differ from the 64001 normal, and zone vs. frost date explains why Zone 6b and Alma's frost date answer different questions.