Colwich, KS 67030 Frost Dates
67030, near Colwich, KS: the frost window
Typically, the last spring freeze lands around 04/08, roughly 223 days out. Fall's first freeze usually shows up around 10/27, roughly 200 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Colwich 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
Colwich's growing season runs out in roughly 9 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
04/08 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/24 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/25 and only about 1 year in 10 sees frost after that.
Colwich against the rest of the dataset
At roughly 200 frost-free days, Colwich places 17,829 of 40,283 ZIP codes in this dataset. Within KS, it ranks 131 of 745.
Learn more
Two guides worth reading on 67030: zone vs. frost date, on why Zone 7a and Colwich's frost date answer different questions, and the frost range, on how to read the range around Colwich's dates instead of trusting one.