Morningside, MD 20742 Frost Dates
20742, near Morningside, 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.
The USDA Plant Hardiness Zone Map puts Morningside 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
Morningside'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.
Why 04/09 isn't a guarantee
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.
Morningside against the rest of the dataset
Morningside's growing season runs about 203 days, ranking 16,968 of 40,283 US ZIP codes measured here, longest to shortest. Within MD, it ranks 396 of 583.
Learn more
Two guides worth reading on 20742: the frost range, on how to read the range around Morningside's dates instead of trusting one, and local microclimates, on what one yard in Morningside can differ from the 20742 normal.