Marston, MO 63866 Frost Dates
Marston, MO: when does the frost end?
Around 03/28 is the usual last spring frost, about 212 days away. Fall's first freeze usually shows up around 11/03, roughly 220 days after the last spring frost.
Marston sits in USDA Zone 7b (5 to 10°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
With roughly 10 weeks until Marston's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
03/28 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/11 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/12 and only about 1 year in 10 sees frost after that.
Marston against the rest of the dataset
Marston's growing season runs about 220 days, ranking 12,895 of 40,283 US ZIP codes measured here, longest to shortest. Within MO, it ranks 43 of 1,129.
Learn more
Before leaning on 63866's figures: the frost range explains how to read the range around Marston's dates instead of trusting one, while local microclimates explains what one yard in Marston can differ from the 63866 normal.