Winfield, MO 63389 Frost Dates
Winfield, MO: when does the frost end?
Typically, the last spring freeze lands around 04/20, roughly 235 days out. 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 Winfield, not a forecast for this year.
Stretching the season past the first frost
With roughly 8 weeks until Winfield's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
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.
Winfield against the rest of the dataset
Winfield's growing season runs about 181 days, ranking 24,612 of 40,283 US ZIP codes measured here, longest to shortest. Within MO, it ranks 990 of 1,129.
Learn more
Before leaning on 63389's figures: local microclimates explains what one yard in Winfield can differ from the 63389 normal, while zone vs. frost date explains why Zone 6b and Winfield's frost date answer different questions.