Millington, MD 21628 Frost Dates
21628, near Millington, MD: the frost window
Typically, the last spring freeze lands around 04/03, roughly 218 days out. Fall's first freeze usually shows up around 11/05, roughly 217 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Millington in Zone 7b (5 to 10°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
Millington's growing season runs out in roughly 10 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
04/03 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/20 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/16 and only about 1 year in 10 sees frost after that.
Millington against the rest of the dataset
About 217 days separate Millington's last and first frost, putting it 13,593 of 40,283 ZIP codes nationally. Within MD, it ranks 320 of 583.
Learn more
Two guides worth reading on 21628: zone vs. frost date, on why Zone 7b and Millington's frost date answer different questions, and the frost range, on how to read the range around Millington's dates instead of trusting one.