Topeka, KS 66606 Frost Dates
Frost dates for Topeka, KS, ZIP 66606
Typically, the last spring freeze lands around 04/16, roughly 231 days out. The first fall frost typically arrives around 10/22, about 189 frost-free days later.
Topeka 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 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 04/16 isn't a guarantee
04/16 is the middle of 30 years of NOAA records, not a promise. Plant by 04/01 and you're betting against frost in roughly 9 years out of 10. 04/27 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Topeka compares
Topeka's growing season runs about 189 days, ranking 21,366 of 40,283 US ZIP codes measured here, longest to shortest. Within KS, it ranks 307 of 745.
Learn more
local microclimates explains what one yard in Topeka can differ from the 66606 normal, and zone vs. frost date explains why Zone 6b and Topeka's frost date answer different questions.