Vermillion, KS 66544 Frost Dates
Frost dates for Vermillion, KS, ZIP 66544
Typically, the last spring freeze lands around 04/20, roughly 235 days out. The first fall frost typically arrives around 10/18, about 180 frost-free days later.
Vermillion sits in USDA Zone 6a (-10 to -5°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 6a around Vermillion 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.
How much risk comes with planting early here
04/20 is the middle of 30 years of NOAA records, not a promise. Plant by 04/04 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 Vermillion compares
Vermillion's growing season runs about 180 days, ranking 25,122 of 40,283 US ZIP codes measured here, longest to shortest. Within KS, it ranks 545 of 745.
Learn more
the frost range explains how to read the range around Vermillion's dates instead of trusting one, and local microclimates explains what one yard in Vermillion can differ from the 66544 normal.