Bel Air, MD 21018 Frost Dates
Bel Air, MD: when does the frost end?
Typically, the last spring freeze lands around 04/10, roughly 225 days out. Fall's first freeze usually shows up around 10/30, roughly 201 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Bel Air 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 9 weeks until Bel Air's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Bel Air's last frost
04/10 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 04/30 and only about 1 year in 10 sees frost after that.
Bel Air against the rest of the dataset
At roughly 201 frost-free days, Bel Air places 17,477 of 40,283 ZIP codes in this dataset. Within MD, it ranks 450 of 583.
Learn more
Before leaning on 21018's figures: local microclimates explains what one yard in Bel Air can differ from the 21018 normal, while zone vs. frost date explains why Zone 7b and Bel Air's frost date answer different questions.