Aberdeen, MD 21028 Frost Dates
Frost dates for Aberdeen, MD, ZIP 21028
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 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 Aberdeen, not a forecast for this year.
What to do before the first frost
Zone 7a around Aberdeen 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.
How much risk comes with planting early here
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 Aberdeen compares
Aberdeen's growing season runs about 201 days, ranking 17,457 of 40,283 US ZIP codes measured here, longest to shortest. Within MD, it ranks 444 of 583.
Learn more
local microclimates explains what one yard in Aberdeen can differ from the 21028 normal, and zone vs. frost date explains why Zone 7a and Aberdeen's frost date answer different questions.