Hunnewell, MO 63439 Frost Dates
Hunnewell, MO: when does the frost end?
The last spring frost here typically falls around 04/21, about 236 days from today. Fall's first freeze usually shows up around 10/17, roughly 177 days after the last spring frost.
Zone 6a (-10 to -5°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 Hunnewell, not a forecast for this year.
Stretching the season past the first frost
With roughly 7 weeks until Hunnewell's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/21 isn't a guarantee
04/21 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/09 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.
Hunnewell against the rest of the dataset
At roughly 177 frost-free days, Hunnewell places 26,289 of 40,283 ZIP codes in this dataset. Within MO, it ranks 1,054 of 1,129.
Learn more
Before leaning on 63439's figures: the frost range explains how to read the range around Hunnewell's dates instead of trusting one, while local microclimates explains what one yard in Hunnewell can differ from the 63439 normal.