Sublette, KS 67877 Frost Dates
Sublette, KS: when does the frost end?
Around 04/23 is the usual last spring frost, about 238 days away. Fall's first freeze usually shows up around 10/21, roughly 179 days after the last spring frost.
Zone 6b (-5 to 0°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 Sublette, not a forecast for this year.
Stretching the season past the first frost
With roughly 8 weeks until Sublette's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/23 isn't a guarantee
04/23 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/07 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/05 and only about 1 year in 10 sees frost after that.
Sublette against the rest of the dataset
Sublette's growing season runs about 179 days, ranking 25,389 of 40,283 US ZIP codes measured here, longest to shortest. Within KS, it ranks 551 of 745.
Learn more
Before leaning on 67877's figures: zone vs. frost date explains why Zone 6b and Sublette's frost date answer different questions, while the frost range explains how to read the range around Sublette's dates instead of trusting one.