Glen Allen, MO 63751 Frost Dates
Glen Allen, MO: when does the frost end?
The last spring frost here typically falls around 04/12, about 227 days from today. Fall's first freeze usually shows up around 10/23, roughly 193 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Glen Allen 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 Glen Allen's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/12 isn't a guarantee
04/12 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/27 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/28 and only about 1 year in 10 sees frost after that.
Glen Allen against the rest of the dataset
Glen Allen's growing season runs about 193 days, ranking 20,093 of 40,283 US ZIP codes measured here, longest to shortest. Within MO, it ranks 690 of 1,129.
Learn more
Before leaning on 63751's figures: the frost range explains how to read the range around Glen Allen's dates instead of trusting one, while local microclimates explains what one yard in Glen Allen can differ from the 63751 normal.