Topeka, KS 66619 Frost Dates
Frost dates for Topeka, KS, ZIP 66619
Typically, the last spring freeze lands around 04/15, roughly 230 days out. The first fall frost typically arrives around 10/21, about 185 frost-free days later.
The USDA Plant Hardiness Zone Map puts Topeka in Zone 6b (-5 to 0°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 6b around Topeka 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 04/15 isn't a guarantee
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 Topeka compares
Topeka's growing season runs about 185 days, ranking 23,014 of 40,283 US ZIP codes measured here, longest to shortest. Within KS, it ranks 408 of 745.
Learn more
the frost range explains how to read the range around Topeka's dates instead of trusting one, and local microclimates explains what one yard in Topeka can differ from the 66619 normal.