Bel Air, MD 21040 Frost Dates
When can you plant in Bel Air, MD?
Typically, the last spring freeze lands around 04/10, roughly 225 days out. The first fall frost typically arrives around 10/30, about 201 frost-free days later.
Zone 7b (5 to 10°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Bel Air, not a forecast for this year.
What to do before the first frost
About 9 weeks of growing season left in Bel Air before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Bel Air's last frost
04/10 is the middle of 30 years of NOAA records, not a promise. Plant by 03/27 and you're betting against frost in roughly 9 years out of 10. 04/30 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Bel Air compares
About 201 days separate Bel Air's last and first frost, putting it 17,478 of 40,283 ZIP codes nationally. Within MD, it ranks 451 of 583.
Learn more
zone vs. frost date covers why Zone 7b and Bel Air's frost date answer different questions. the frost range covers how to read the range around Bel Air's dates instead of trusting one.