Elsberry, MO 63343 Frost Dates
63343, near Elsberry, MO: the frost window
Around 04/20 is the usual last spring frost, about 235 days away. Fall's first freeze usually shows up around 10/20, roughly 181 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 Elsberry, not a forecast for this year.
Stretching the season past the first frost
Elsberry'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 04/20 isn't a guarantee
04/20 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/06 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/05 and only about 1 year in 10 sees frost after that.
Elsberry against the rest of the dataset
About 181 days separate Elsberry's last and first frost, putting it 24,566 of 40,283 ZIP codes nationally. Within MO, it ranks 988 of 1,129.
Learn more
Two guides worth reading on 63343: zone vs. frost date, on why Zone 6b and Elsberry's frost date answer different questions, and the frost range, on how to read the range around Elsberry's dates instead of trusting one.