Olathe, KS 66283 Frost Dates
When can you plant in Olathe, KS?
The last spring frost here typically falls around 04/10, about 225 days from today. The first fall frost typically arrives around 10/29, about 202 frost-free days later.
Olathe 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.
What to do before the first frost
About 9 weeks of growing season left in Olathe before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/10 isn't a guarantee
04/10 is the middle of 30 years of NOAA records, not a promise. Plant by 03/27 and you're betting against frost in roughly 9 years out of 10. 04/24 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Olathe compares
At roughly 202 frost-free days, Olathe places 17,101 of 40,283 ZIP codes in this dataset. Within KS, it ranks 81 of 745.
Learn more
zone vs. frost date covers why Zone 6b and Olathe's frost date answer different questions. the frost range covers how to read the range around Olathe's dates instead of trusting one.