Grainfield, KS 67737 Frost Dates
67737, near Grainfield, KS: the frost window
Typically, the last spring freeze lands around 04/24, roughly 239 days out. Fall's first freeze usually shows up around 10/18, roughly 176 days after the last spring frost.
Zone 6a (-10 to -5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Grainfield, not a forecast for this year.
Stretching the season past the first frost
Grainfield'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.
Why 04/24 isn't a guarantee
04/24 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/09 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/07 and only about 1 year in 10 sees frost after that.
Grainfield against the rest of the dataset
About 176 days separate Grainfield's last and first frost, putting it 26,628 of 40,283 ZIP codes nationally. Within KS, it ranks 591 of 745.
Learn more
Two guides worth reading on 67737: the frost range, on how to read the range around Grainfield's dates instead of trusting one, and local microclimates, on what one yard in Grainfield can differ from the 67737 normal.