Bel Air, MD 21084 Frost Dates
When can you plant in Bel Air, MD?
Around 04/03 is the usual last spring frost, about 218 days away. The first fall frost typically arrives around 11/06, about 217 frost-free days later.
Zone 7a (0 to 5°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 10 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
04/03 is the middle of 30 years of NOAA records, not a promise. Plant by 03/22 and you're betting against frost in roughly 9 years out of 10. 04/18 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Bel Air compares
Bel Air's growing season runs about 217 days, ranking 13,444 of 40,283 US ZIP codes measured here, longest to shortest. Within MD, it ranks 281 of 583.
Learn more
local microclimates covers what one yard in Bel Air can differ from the 21084 normal. zone vs. frost date covers why Zone 7a and Bel Air's frost date answer different questions.