Foristell, MO 63348 Frost Dates
Frost dates for Foristell, MO, ZIP 63348
The last spring frost here typically falls around 04/14, about 229 days from today. The first fall frost typically arrives around 10/23, about 191 frost-free days later.
Foristell 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 Foristell has about 8 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 Foristell's last frost
04/14 is the middle of 30 years of NOAA records, not a promise. Plant by 03/31 and you're betting against frost in roughly 9 years out of 10. 05/03 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Foristell compares
Foristell's growing season runs about 191 days, ranking 20,852 of 40,283 US ZIP codes measured here, longest to shortest. Within MO, it ranks 748 of 1,129.
Learn more
local microclimates explains what one yard in Foristell can differ from the 63348 normal, and zone vs. frost date explains why Zone 6b and Foristell's frost date answer different questions.