New Carrollton, MD 20706 Frost Dates
New Carrollton, MD: when does the frost end?
Typically, the last spring freeze lands around 04/22, roughly 237 days out. Fall's first freeze usually shows up around 10/22, roughly 183 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts New Carrollton 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
With roughly 8 weeks until New Carrollton's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/22 isn't a guarantee
04/22 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/03 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/09 and only about 1 year in 10 sees frost after that.
New Carrollton against the rest of the dataset
About 183 days separate New Carrollton's last and first frost, putting it 23,801 of 40,283 ZIP codes nationally. Within MD, it ranks 540 of 583.
Learn more
Before leaning on 20706's figures: local microclimates explains what one yard in New Carrollton can differ from the 20706 normal, while zone vs. frost date explains why Zone 7b and New Carrollton's frost date answer different questions.