Derby, KS 67037 Frost Dates
Derby, KS: when does the frost end?
Typically, the last spring freeze lands around 04/14, roughly 229 days out. Fall's first freeze usually shows up around 10/22, roughly 189 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Derby in Zone 7a (0 to 5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 8 weeks until Derby's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Derby's last frost
04/14 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/30 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.
Derby against the rest of the dataset
Derby's growing season runs about 189 days, ranking 21,412 of 40,283 US ZIP codes measured here, longest to shortest. Within KS, it ranks 326 of 745.
Learn more
Before leaning on 67037's figures: the frost range explains how to read the range around Derby's dates instead of trusting one, while local microclimates explains what one yard in Derby can differ from the 67037 normal.