Vienna, MO 65443 Frost Dates
65443, near Vienna, MO: the frost window
The last spring frost here typically falls around 04/08, about 223 days from today. Fall's first freeze usually shows up around 10/26, roughly 200 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 Vienna, not a forecast for this year.
Stretching the season past the first frost
Vienna'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.
How much risk comes with planting early here
04/08 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/21 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/27 and only about 1 year in 10 sees frost after that.
Vienna against the rest of the dataset
At roughly 200 frost-free days, Vienna places 17,871 of 40,283 ZIP codes in this dataset. Within MO, it ranks 398 of 1,129.
Learn more
Two guides worth reading on 65443: local microclimates, on what one yard in Vienna can differ from the 65443 normal, and zone vs. frost date, on why Zone 6b and Vienna's frost date answer different questions.