Clarence, MO 63431 Frost Dates
Frost dates for Clarence, MO, ZIP 63431
The last spring frost here typically falls around 04/08, about 223 days from today. The first fall frost typically arrives around 10/28, about 201 frost-free days later.
The USDA Plant Hardiness Zone Map puts Clarence in Zone 6a (-10 to -5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 6a around Clarence 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 Clarence's last frost
04/08 is the middle of 30 years of NOAA records, not a promise. Plant by 03/23 and you're betting against frost in roughly 9 years out of 10. 04/24 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Clarence compares
Clarence's growing season runs about 201 days, ranking 17,606 of 40,283 US ZIP codes measured here, longest to shortest. Within MO, it ranks 373 of 1,129.
Learn more
local microclimates explains what one yard in Clarence can differ from the 63431 normal, and zone vs. frost date explains why Zone 6a and Clarence's frost date answer different questions.