Leonardtown, MD 20667 Frost Dates
Leonardtown, MD: when does the frost end?
Around 03/30 is the usual last spring frost, about 214 days away. Fall's first freeze usually shows up around 11/14, roughly 229 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 11 weeks until Leonardtown's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 03/30 isn't a guarantee
03/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/14 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/11 and only about 1 year in 10 sees frost after that.
Leonardtown against the rest of the dataset
About 229 days separate Leonardtown's last and first frost, putting it 10,575 of 40,283 ZIP codes nationally. Within MD, it ranks 88 of 583.
Learn more
Before leaning on 20667'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 20667 normal.