Marshall, MO 65340 Frost Dates
Frost dates for Marshall, MO, ZIP 65340
Around 04/10 is the usual last spring frost, about 225 days away. The first fall frost typically arrives around 10/24, about 196 frost-free days later.
Zone 6b (-5 to 0°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Marshall, not a forecast for this year.
What to do before the first frost
Zone 6b around Marshall has about 8 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.
The actual range around Marshall's last frost
04/10 is the middle of 30 years of NOAA records, not a promise. Plant by 03/27 and you're betting against frost in roughly 9 years out of 10. 04/27 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Marshall compares
Marshall's growing season runs about 196 days, ranking 18,926 of 40,283 US ZIP codes measured here, longest to shortest. Within MO, it ranks 569 of 1,129.
Learn more
the frost range explains how to read the range around Marshall's dates instead of trusting one, and local microclimates explains what one yard in Marshall can differ from the 65340 normal.