Osage City, KS 66523 Frost Dates
66523, near Osage City, KS: the frost window
Typically, the last spring freeze lands around 04/13, roughly 228 days out. Fall's first freeze usually shows up around 10/26, roughly 194 days after the last spring frost.
Osage City 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
Osage City'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.
The actual range around Osage City's last frost
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.
Osage City against the rest of the dataset
At roughly 194 frost-free days, Osage City places 19,491 of 40,283 ZIP codes in this dataset. Within KS, it ranks 218 of 745.
Learn more
Two guides worth reading on 66523: local microclimates, on what one yard in Osage City can differ from the 66523 normal, and zone vs. frost date, on why Zone 6b and Osage City's frost date answer different questions.