Plato, MO 65484 Frost Dates
65484, near Plato, MO: the frost window
The last spring frost here typically falls around 04/10, about 225 days from today. Fall's first freeze usually shows up around 10/23, roughly 194 days after the last spring frost.
Zone 6b (-5 to 0°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Plato, not a forecast for this year.
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.
Why 04/10 isn't a guarantee
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 19,658 of 40,283 US ZIP codes measured here, longest to shortest. Within MO, it ranks 660 of 1,129.
Learn more
Two guides worth reading on 65484: local microclimates, on what one yard in Plato can differ from the 65484 normal, and zone vs. frost date, on why Zone 6b and Plato's frost date answer different questions.