Wheaton, MO 64874 Frost Dates
Wheaton, MO: when does the frost end?
Around 04/09 is the usual last spring frost, about 224 days away. Fall's first freeze usually shows up around 10/26, roughly 199 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Wheaton in Zone 7a (0 to 5°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 Wheaton's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Wheaton's last frost
04/09 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/24 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.
Wheaton against the rest of the dataset
At roughly 199 frost-free days, Wheaton places 18,179 of 40,283 ZIP codes in this dataset. Within MO, it ranks 443 of 1,129.
Learn more
Before leaning on 64874's figures: the frost range explains how to read the range around Wheaton's dates instead of trusting one, while local microclimates explains what one yard in Wheaton can differ from the 64874 normal.