Bel Air, MD 21015 Frost Dates
Frost dates for Bel Air, MD, ZIP 21015
The last spring frost here typically falls around 04/10, about 225 days from today. The first fall frost typically arrives around 10/30, about 201 frost-free days later.
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.
What to do before the first frost
Zone 7b around Bel Air has about 9 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
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 17,476 of 40,283 ZIP codes nationally. Within MD, it ranks 449 of 583.
Learn more
local microclimates explains what one yard in Bel Air can differ from the 21015 normal, and zone vs. frost date explains why Zone 7b and Bel Air's frost date answer different questions.