Blackwater, MO 65322 Frost Dates
Frost dates for Blackwater, MO, ZIP 65322
Around 04/05 is the usual last spring frost, about 220 days away. The first fall frost typically arrives around 10/29, about 206 frost-free days later.
Blackwater sits in USDA Zone 6b (-5 to 0°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 6b around Blackwater 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.
Why 04/05 isn't a guarantee
04/05 is the middle of 30 years of NOAA records, not a promise. Plant by 03/19 and you're betting against frost in roughly 9 years out of 10. 04/19 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Blackwater compares
At roughly 206 frost-free days, Blackwater places 16,138 of 40,283 ZIP codes in this dataset. Within MO, it ranks 242 of 1,129.
Learn more
local microclimates explains what one yard in Blackwater can differ from the 65322 normal, and zone vs. frost date explains why Zone 6b and Blackwater's frost date answer different questions.