Seneca, MO 64865 Frost Dates
Frost dates for Seneca, MO, ZIP 64865
Typically, the last spring freeze lands around 04/07, roughly 222 days out. The first fall frost typically arrives around 10/31, about 206 frost-free days later.
The USDA Plant Hardiness Zone Map puts Seneca in Zone 7a (0 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
Zone 7a around Seneca 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
04/07 is the middle of 30 years of NOAA records, not a promise. Plant by 03/18 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 Seneca compares
About 206 days separate Seneca's last and first frost, putting it 16,026 of 40,283 ZIP codes nationally. Within MO, it ranks 228 of 1,129.
Learn more
local microclimates explains what one yard in Seneca can differ from the 64865 normal, and zone vs. frost date explains why Zone 7a and Seneca's frost date answer different questions.