Topeka, KS 66609 Frost Dates
Topeka, KS: when does the frost end?
Around 04/15 is the usual last spring frost, about 230 days away. Fall's first freeze usually shows up around 10/21, roughly 185 days after the last spring frost.
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.
Stretching the season past the first frost
With roughly 8 weeks until Topeka's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Topeka's last frost
04/15 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/30 and only about 1 year in 10 sees frost after that.
Topeka against the rest of the dataset
About 185 days separate Topeka's last and first frost, putting it 23,011 of 40,283 ZIP codes nationally. Within KS, it ranks 405 of 745.
Learn more
Before leaning on 66609's figures: the frost range explains how to read the range around Topeka's dates instead of trusting one, while local microclimates explains what one yard in Topeka can differ from the 66609 normal.