Plato, MO 65570 Frost Dates
65570, near Plato, MO: the frost window
Around 04/10 is the usual last spring frost, about 225 days away. Fall's first freeze usually shows up around 10/23, roughly 194 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Plato 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
Plato'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 Plato's last frost
04/10 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/25 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/01 and only about 1 year in 10 sees frost after that.
Plato against the rest of the dataset
Plato's growing season runs about 194 days, ranking 19,659 of 40,283 US ZIP codes measured here, longest to shortest. Within MO, it ranks 661 of 1,129.
Learn more
Two guides worth reading on 65570: zone vs. frost date, on why Zone 6b and Plato's frost date answer different questions, and the frost range, on how to read the range around Plato's dates instead of trusting one.