Glenarden, MD 20774 Frost Dates
20774, near Glenarden, MD: the frost window
Typically, the last spring freeze lands around 04/09, roughly 224 days out. Fall's first freeze usually shows up around 10/29, roughly 203 days after the last spring frost.
Glenarden 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
Glenarden'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 Glenarden's last frost
04/09 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 04/24 and only about 1 year in 10 sees frost after that.
Glenarden against the rest of the dataset
At roughly 203 frost-free days, Glenarden places 16,887 of 40,283 ZIP codes in this dataset. Within MD, it ranks 378 of 583.
Learn more
Two guides worth reading on 20774: the frost range, on how to read the range around Glenarden's dates instead of trusting one, and local microclimates, on what one yard in Glenarden can differ from the 20774 normal.