Whiteside, MO 63387 Frost Dates
Whiteside, 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.
The USDA Plant Hardiness Zone Map puts Whiteside 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 Whiteside'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.
Whiteside against the rest of the dataset
At roughly 181 frost-free days, Whiteside places 24,748 of 40,283 ZIP codes in this dataset. Within MO, it ranks 1,004 of 1,129.
Learn more
Before leaning on 63387's figures: the frost range explains how to read the range around Whiteside's dates instead of trusting one, while local microclimates explains what one yard in Whiteside can differ from the 63387 normal.