Highland Beach, MD 21666 Frost Dates
Highland Beach, MD: when does the frost end?
Typically, the last spring freeze lands around 03/29, roughly 213 days out. Fall's first freeze usually shows up around 11/12, roughly 228 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Highland Beach 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 Highland Beach'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 04/08 and only about 1 year in 10 sees frost after that.
Highland Beach against the rest of the dataset
About 228 days separate Highland Beach's last and first frost, putting it 10,930 of 40,283 ZIP codes nationally. Within MD, it ranks 103 of 583.
Learn more
Before leaning on 21666's figures: local microclimates explains what one yard in Highland Beach can differ from the 21666 normal, while zone vs. frost date explains why Zone 8a and Highland Beach's frost date answer different questions.