Allen, KS 66833 Frost Dates
Frost dates for Allen, KS, ZIP 66833
Typically, the last spring freeze lands around 04/15, roughly 230 days out. The first fall frost typically arrives around 10/23, about 190 frost-free days later.
Allen 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 Allen 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 Allen's last frost
04/15 is the middle of 30 years of NOAA records, not a promise. Plant by 04/02 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 Allen compares
At roughly 190 frost-free days, Allen places 21,329 of 40,283 ZIP codes in this dataset. Within KS, it ranks 295 of 745.
Learn more
local microclimates explains what one yard in Allen can differ from the 66833 normal, and zone vs. frost date explains why Zone 6b and Allen's frost date answer different questions.