Leonardtown, MD 20680 Frost Dates
Frost dates for Leonardtown, MD, ZIP 20680
Typically, the last spring freeze lands around 03/30, roughly 214 days out. The first fall frost typically arrives around 11/14, about 229 frost-free days later.
Zone 8a (10 to 15°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 Leonardtown, not a forecast for this year.
What to do before the first frost
Zone 8a around Leonardtown has about 11 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 Leonardtown's last frost
03/30 is the middle of 30 years of NOAA records, not a promise. Plant by 03/14 and you're betting against frost in roughly 9 years out of 10. 04/11 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Leonardtown compares
At roughly 229 frost-free days, Leonardtown places 10,577 of 40,283 ZIP codes in this dataset. Within MD, it ranks 90 of 583.
Learn more
the frost range explains how to read the range around Leonardtown's dates instead of trusting one, and local microclimates explains what one yard in Leonardtown can differ from the 20680 normal.