Thayer, KS 66776 Frost Dates
Thayer, KS: when does the frost end?
Around 04/10 is the usual last spring frost, about 225 days away. Fall's first freeze usually shows up around 10/26, roughly 197 days after the last spring frost.
Zone 7a (0 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 Thayer, not a forecast for this year.
Stretching the season past the first frost
With roughly 8 weeks until Thayer's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/10 isn't a guarantee
04/10 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/27 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/28 and only about 1 year in 10 sees frost after that.
Thayer against the rest of the dataset
Thayer's growing season runs about 197 days, ranking 18,803 of 40,283 US ZIP codes measured here, longest to shortest. Within KS, it ranks 206 of 745.
Learn more
Before leaning on 66776's figures: the frost range explains how to read the range around Thayer's dates instead of trusting one, while local microclimates explains what one yard in Thayer can differ from the 66776 normal.