New Market, MD 21770 Frost Dates
21770, near New Market, MD: the frost window
Typically, the last spring freeze lands around 04/14, roughly 229 days out. Fall's first freeze usually shows up around 10/29, roughly 196 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts New Market in Zone 7a (0 to 5°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
New Market's growing season runs out in roughly 9 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
04/14 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/31 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/02 and only about 1 year in 10 sees frost after that.
New Market against the rest of the dataset
About 196 days separate New Market's last and first frost, putting it 19,015 of 40,283 ZIP codes nationally. Within MD, it ranks 491 of 583.
Learn more
Two guides worth reading on 21770: the frost range, on how to read the range around New Market's dates instead of trusting one, and local microclimates, on what one yard in New Market can differ from the 21770 normal.