Bismarck, MO 63624 Frost Dates
Bismarck, MO: when does the frost end?
The last spring frost here typically falls around 04/13, about 228 days from today. Fall's first freeze usually shows up around 10/21, roughly 191 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Bismarck 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
With roughly 8 weeks until Bismarck's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
04/13 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/30 and only about 1 year in 10 sees frost after that.
Bismarck against the rest of the dataset
About 191 days separate Bismarck's last and first frost, putting it 20,821 of 40,283 ZIP codes nationally. Within MO, it ranks 737 of 1,129.
Learn more
Before leaning on 63624's figures: the frost range explains how to read the range around Bismarck's dates instead of trusting one, while local microclimates explains what one yard in Bismarck can differ from the 63624 normal.