Stewartsville, MO 64490 Frost Dates
Frost dates for Stewartsville, MO, ZIP 64490
The last spring frost here typically falls around 04/17, about 232 days from today. The first fall frost typically arrives around 10/19, about 184 frost-free days later.
Zone 6a (-10 to -5°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 Stewartsville, not a forecast for this year.
What to do before the first frost
Zone 6a around Stewartsville has about 7 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
04/17 is the middle of 30 years of NOAA records, not a promise. Plant by 04/03 and you're betting against frost in roughly 9 years out of 10. 05/01 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Stewartsville compares
Stewartsville's growing season runs about 184 days, ranking 23,610 of 40,283 US ZIP codes measured here, longest to shortest. Within MO, it ranks 911 of 1,129.
Learn more
local microclimates explains what one yard in Stewartsville can differ from the 64490 normal, and zone vs. frost date explains why Zone 6a and Stewartsville's frost date answer different questions.