Bison, KS 67520 Frost Dates
67520, near Bison, KS: the frost window
Typically, the last spring freeze lands around 04/25, roughly 240 days out. Fall's first freeze usually shows up around 10/15, roughly 171 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Bison in Zone 6a (-10 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
Bison's growing season runs out in roughly 7 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Bison's last frost
04/25 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/12 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/08 and only about 1 year in 10 sees frost after that.
Bison against the rest of the dataset
Bison's growing season runs about 171 days, ranking 28,832 of 40,283 US ZIP codes measured here, longest to shortest. Within KS, it ranks 660 of 745.
Learn more
Two guides worth reading on 67520: the frost range, on how to read the range around Bison's dates instead of trusting one, and local microclimates, on what one yard in Bison can differ from the 67520 normal.