Tarkio, MO 64491 Frost Dates
Frost dates for Tarkio, MO, ZIP 64491
The last spring frost here typically falls around 04/19, about 234 days from today. The first fall frost typically arrives around 10/15, about 177 frost-free days later.
Tarkio sits in USDA Zone 5b (-15 to -10°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
Zone 5b around Tarkio 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.
Why 04/19 isn't a guarantee
04/19 is the middle of 30 years of NOAA records, not a promise. Plant by 04/06 and you're betting against frost in roughly 9 years out of 10. 05/04 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Tarkio compares
About 177 days separate Tarkio's last and first frost, putting it 26,166 of 40,283 ZIP codes nationally. Within MO, it ranks 1,046 of 1,129.
Learn more
local microclimates explains what one yard in Tarkio can differ from the 64491 normal, and zone vs. frost date explains why Zone 5b and Tarkio's frost date answer different questions.