Leonardtown, MD 20634 Frost Dates
Leonardtown, MD: when does the frost end?
Typically, the last spring freeze lands around 03/22, roughly 206 days out. Fall's first freeze usually shows up around 11/26, roughly 248 days after the last spring frost.
Leonardtown 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.
Stretching the season past the first frost
With roughly 13 weeks until Leonardtown's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 03/22 isn't a guarantee
03/22 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/06 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/05 and only about 1 year in 10 sees frost after that.
Leonardtown against the rest of the dataset
Leonardtown's growing season runs about 248 days, ranking 7,701 of 40,283 US ZIP codes measured here, longest to shortest. Within MD, it ranks 8 of 583.
Learn more
Before leaning on 20634's figures: local microclimates explains what one yard in Leonardtown can differ from the 20634 normal, while zone vs. frost date explains why Zone 8a and Leonardtown's frost date answer different questions.