Highland Beach, MD 21403 Frost Dates
When can you plant in Highland Beach, MD?
Around 03/23 is the usual last spring frost, about 207 days away. The first fall frost typically arrives around 11/20, about 241 frost-free days later.
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.
What to do before the first frost
About 12 weeks of growing season left in Highland Beach before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Highland Beach's last frost
03/23 is the middle of 30 years of NOAA records, not a promise. Plant by 03/08 and you're betting against frost in roughly 9 years out of 10. 04/06 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Highland Beach compares
About 241 days separate Highland Beach's last and first frost, putting it 8,654 of 40,283 ZIP codes nationally. Within MD, it ranks 62 of 583.
Learn more
zone vs. frost date covers why Zone 8a and Highland Beach's frost date answer different questions. the frost range covers how to read the range around Highland Beach's dates instead of trusting one.