Brookeville, MD 21041 Frost Dates
21041, near Brookeville, MD: the frost window
Typically, the last spring freeze lands around 04/05, roughly 220 days out. Fall's first freeze usually shows up around 11/09, roughly 218 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Brookeville 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
Brookeville'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.
The actual range around Brookeville's last frost
04/05 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/21 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/19 and only about 1 year in 10 sees frost after that.
Brookeville against the rest of the dataset
About 218 days separate Brookeville's last and first frost, putting it 13,349 of 40,283 ZIP codes nationally. Within MD, it ranks 270 of 583.
Learn more
Two guides worth reading on 21041: local microclimates, on what one yard in Brookeville can differ from the 21041 normal, and zone vs. frost date, on why Zone 7b and Brookeville's frost date answer different questions.