Seneca, MO 64858 Frost Dates
Frost dates for Seneca, MO, ZIP 64858
Around 04/07 is the usual last spring frost, about 222 days away. The first fall frost typically arrives around 10/31, about 206 frost-free days later.
Zone 7a (0 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 Seneca, not a forecast for this year.
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.
The actual range around Seneca's last frost
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 16,025 of 40,283 ZIP codes nationally. Within MO, it ranks 227 of 1,129.
Learn more
zone vs. frost date explains why Zone 7a and Seneca's frost date answer different questions, and the frost range explains how to read the range around Seneca's dates instead of trusting one.