Highland Beach, MD 20778 Frost Dates
Frost dates for Highland Beach, MD, ZIP 20778
Around 03/27 is the usual last spring frost, about 211 days away. The first fall frost typically arrives around 11/13, about 234 frost-free days later.
Zone 8a (10 to 15°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Highland Beach, not a forecast for this year.
What to do before the first frost
Zone 8a around Highland Beach has about 11 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
03/27 is the middle of 30 years of NOAA records, not a promise. Plant by 03/09 and you're betting against frost in roughly 9 years out of 10. 04/09 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Highland Beach compares
About 234 days separate Highland Beach's last and first frost, putting it 9,820 of 40,283 ZIP codes nationally. Within MD, it ranks 76 of 583.
Learn more
the frost range explains how to read the range around Highland Beach's dates instead of trusting one, and local microclimates explains what one yard in Highland Beach can differ from the 20778 normal.