Bel Air, MD 21047 Frost Dates
Bel Air, MD: when does the frost end?
The last spring frost here typically falls around 04/10, about 225 days from today. Fall's first freeze usually shows up around 10/30, roughly 201 days after the last spring frost.
Bel Air 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
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.
Why 04/10 isn't a guarantee
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
Bel Air's growing season runs about 201 days, ranking 17,479 of 40,283 US ZIP codes measured here, longest to shortest. Within MD, it ranks 452 of 583.
Learn more
Before leaning on 21047's figures: zone vs. frost date explains why Zone 7b and Bel Air's frost date answer different questions, while the frost range explains how to read the range around Bel Air's dates instead of trusting one.