Leonardtown, MD 20609 Frost Dates
Leonardtown, MD: when does the frost end?
Typically, the last spring freeze lands around 04/17, roughly 232 days out. Fall's first freeze usually shows up around 10/27, roughly 195 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Leonardtown in Zone 8a (10 to 15°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 9 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
04/17 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/31 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/02 and only about 1 year in 10 sees frost after that.
Leonardtown against the rest of the dataset
About 195 days separate Leonardtown's last and first frost, putting it 19,250 of 40,283 ZIP codes nationally. Within MD, it ranks 507 of 583.
Learn more
Before leaning on 20609'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 20609 normal.