Princess Anne, MD 21840 Frost Dates
Frost dates for Princess Anne, MD, ZIP 21840
Around 04/08 is the usual last spring frost, about 223 days away. The first fall frost typically arrives around 11/04, about 209 frost-free days later.
The USDA Plant Hardiness Zone Map puts Princess Anne in Zone 8a (10 to 15°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 8a around Princess Anne has about 10 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.
Why 04/08 isn't a guarantee
04/08 is the middle of 30 years of NOAA records, not a promise. Plant by 03/24 and you're betting against frost in roughly 9 years out of 10. 04/23 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Princess Anne compares
At roughly 209 frost-free days, Princess Anne places 15,234 of 40,283 ZIP codes in this dataset. Within MD, it ranks 343 of 583.
Learn more
local microclimates explains what one yard in Princess Anne can differ from the 21840 normal, and zone vs. frost date explains why Zone 8a and Princess Anne's frost date answer different questions.