Scranton, KS 66537 Frost Dates
66537, near Scranton, KS: the frost window
Around 04/13 is the usual last spring frost, about 228 days away. Fall's first freeze usually shows up around 10/26, roughly 194 days after the last spring frost.
Scranton sits in USDA Zone 6b (-5 to 0°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
Scranton's growing season runs out in roughly 8 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
04/13 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/30 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.
Scranton against the rest of the dataset
Scranton's growing season runs about 194 days, ranking 19,568 of 40,283 US ZIP codes measured here, longest to shortest. Within KS, it ranks 221 of 745.
Learn more
Two guides worth reading on 66537: zone vs. frost date, on why Zone 6b and Scranton's frost date answer different questions, and the frost range, on how to read the range around Scranton's dates instead of trusting one.