Leonardtown, MD 20670 Frost Dates
Leonardtown, MD: when does the frost end?
The last spring frost here typically falls around 03/29, about 213 days from today. Fall's first freeze usually shows up around 11/15, roughly 230 days after the last spring frost.
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.
Stretching the season past the first frost
With roughly 11 weeks until Leonardtown's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
03/29 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/15 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/10 and only about 1 year in 10 sees frost after that.
Leonardtown against the rest of the dataset
About 230 days separate Leonardtown's last and first frost, putting it 10,402 of 40,283 ZIP codes nationally. Within MD, it ranks 79 of 583.
Learn more
Before leaning on 20670's figures: the frost range explains how to read the range around Leonardtown's dates instead of trusting one, while local microclimates explains what one yard in Leonardtown can differ from the 20670 normal.