Olsburg, KS 66426 Frost Dates
Frost dates for Olsburg, KS, ZIP 66426
Around 04/22 is the usual last spring frost, about 237 days away. The first fall frost typically arrives around 10/20, about 179 frost-free days later.
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.
What to do before the first frost
Zone 6a around Olsburg has about 8 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
Why 04/22 isn't a guarantee
04/22 is the middle of 30 years of NOAA records, not a promise. Plant by 04/08 and you're betting against frost in roughly 9 years out of 10. 05/05 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Olsburg compares
At roughly 179 frost-free days, Olsburg places 25,497 of 40,283 ZIP codes in this dataset. Within KS, it ranks 561 of 745.
Learn more
the frost range explains how to read the range around Olsburg's dates instead of trusting one, and local microclimates explains what one yard in Olsburg can differ from the 66426 normal.