Annapolis, MD 21405 Frost Dates
When can you plant in Annapolis, MD?
Typically, the last spring freeze lands around 03/27, roughly 211 days out. The first fall frost typically arrives around 11/13, about 234 frost-free days later.
Annapolis sits in USDA Zone 8a (10 to 15°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
About 11 weeks of growing season left in Annapolis before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 03/27 isn't a guarantee
03/27 is the middle of 30 years of NOAA records, not a promise. Plant by 03/09 and you're betting against frost in roughly 9 years out of 10. 04/09 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Annapolis compares
Annapolis's growing season runs about 234 days, ranking 9,706 of 40,283 US ZIP codes measured here, longest to shortest. Within MD, it ranks 73 of 583.
Learn more
local microclimates covers what one yard in Annapolis can differ from the 21405 normal. zone vs. frost date covers why Zone 8a and Annapolis's frost date answer different questions.