Birch Tree, MO 65438 Frost Dates
65438, near Birch Tree, MO: the frost window
Around 04/22 is the usual last spring frost, about 237 days away. Fall's first freeze usually shows up around 10/18, roughly 176 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Birch Tree 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
Birch Tree's growing season runs out in roughly 7 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/22 isn't a guarantee
04/22 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/08 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/06 and only about 1 year in 10 sees frost after that.
Birch Tree against the rest of the dataset
At roughly 176 frost-free days, Birch Tree places 26,596 of 40,283 ZIP codes in this dataset. Within MO, it ranks 1,062 of 1,129.
Learn more
Two guides worth reading on 65438: zone vs. frost date, on why Zone 6b and Birch Tree's frost date answer different questions, and the frost range, on how to read the range around Birch Tree's dates instead of trusting one.