Grenola, KS 67346 Frost Dates
Frost dates for Grenola, KS, ZIP 67346
Typically, the last spring freeze lands around 04/17, roughly 232 days out. The first fall frost typically arrives around 10/22, about 186 frost-free days later.
Grenola sits in USDA Zone 7a (0 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 7a around Grenola 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.
Why 04/17 isn't a guarantee
04/17 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. 04/30 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Grenola compares
Grenola's growing season runs about 186 days, ranking 22,964 of 40,283 US ZIP codes measured here, longest to shortest. Within KS, it ranks 394 of 745.
Learn more
local microclimates explains what one yard in Grenola can differ from the 67346 normal, and zone vs. frost date explains why Zone 7a and Grenola's frost date answer different questions.