Pretty Prairie, KS 67570 Frost Dates
Frost dates for Pretty Prairie, KS, ZIP 67570
Typically, the last spring freeze lands around 04/21, roughly 236 days out. The first fall frost typically arrives around 10/18, about 180 frost-free days later.
Pretty Prairie 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 Pretty Prairie 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.
Why 04/21 isn't a guarantee
04/21 is the middle of 30 years of NOAA records, not a promise. Plant by 04/06 and you're betting against frost in roughly 9 years out of 10. 05/04 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Pretty Prairie compares
At roughly 180 frost-free days, Pretty Prairie places 24,999 of 40,283 ZIP codes in this dataset. Within KS, it ranks 525 of 745.
Learn more
zone vs. frost date explains why Zone 6b and Pretty Prairie's frost date answer different questions, and the frost range explains how to read the range around Pretty Prairie's dates instead of trusting one.