Black Jack, MO 63033 Frost Dates
Frost dates for Black Jack, MO, ZIP 63033
Around 04/02 is the usual last spring frost, about 217 days away. The first fall frost typically arrives around 11/04, about 215 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 Black Jack, not a forecast for this year.
What to do before the first frost
Zone 7a around Black Jack has about 10 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 Black Jack's last frost
04/02 is the middle of 30 years of NOAA records, not a promise. Plant by 03/17 and you're betting against frost in roughly 9 years out of 10. 04/17 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Black Jack compares
At roughly 215 frost-free days, Black Jack places 14,075 of 40,283 ZIP codes in this dataset. Within MO, it ranks 117 of 1,129.
Learn more
local microclimates explains what one yard in Black Jack can differ from the 63033 normal, and zone vs. frost date explains why Zone 7a and Black Jack's frost date answer different questions.