Olsburg, KS 66520 Frost Dates
66520, near Olsburg, KS: the frost window
The last spring frost here typically falls around 04/22, about 237 days from today. Fall's first freeze usually shows up around 10/20, roughly 179 days after the last spring frost.
Olsburg sits in USDA Zone 6a (-10 to -5°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
Olsburg'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.
Why 04/22 isn't a guarantee
04/22 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/08 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.
Olsburg against the rest of the dataset
At roughly 179 frost-free days, Olsburg places 25,498 of 40,283 ZIP codes in this dataset. Within KS, it ranks 562 of 745.
Learn more
Two guides worth reading on 66520: the frost range, on how to read the range around Olsburg's dates instead of trusting one, and local microclimates, on what one yard in Olsburg can differ from the 66520 normal.