Denton, MD 21670 Frost Dates
21670, near Denton, MD: the frost window
Typically, the last spring freeze lands around 04/11, roughly 226 days out. Fall's first freeze usually shows up around 10/30, roughly 200 days after the last spring frost.
Denton 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
Denton'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.
The actual range around Denton's last frost
04/11 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/29 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.
Denton against the rest of the dataset
Denton's growing season runs about 200 days, ranking 17,776 of 40,283 US ZIP codes measured here, longest to shortest. Within MD, it ranks 465 of 583.
Learn more
Two guides worth reading on 21670: the frost range, on how to read the range around Denton's dates instead of trusting one, and local microclimates, on what one yard in Denton can differ from the 21670 normal.