Lee's Summit, MO 64086 Frost Dates
64086, near Lee's Summit, MO: the frost window
Typically, the last spring freeze lands around 04/07, roughly 222 days out. Fall's first freeze usually shows up around 10/29, roughly 202 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Lee's Summit in Zone 6b (-5 to 0°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Lee's Summit's growing season runs out in roughly 9 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
04/07 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/21 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/24 and only about 1 year in 10 sees frost after that.
Lee's Summit against the rest of the dataset
Lee's Summit's growing season runs about 202 days, ranking 17,105 of 40,283 US ZIP codes measured here, longest to shortest. Within MO, it ranks 327 of 1,129.
Learn more
Two guides worth reading on 64086: zone vs. frost date, on why Zone 6b and Lee's Summit's frost date answer different questions, and the frost range, on how to read the range around Lee's Summit's dates instead of trusting one.