Cambridge, MD 21613 Frost Dates
Frost dates for Cambridge, MD, ZIP 21613
Around 04/01 is the usual last spring frost, about 216 days away. The first fall frost typically arrives around 11/07, about 220 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 Cambridge, not a forecast for this year.
What to do before the first frost
Zone 8a around Cambridge has about 10 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.
The actual range around Cambridge's last frost
04/01 is the middle of 30 years of NOAA records, not a promise. Plant by 03/18 and you're betting against frost in roughly 9 years out of 10. 04/15 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Cambridge compares
At roughly 220 frost-free days, Cambridge places 12,760 of 40,283 ZIP codes in this dataset. Within MD, it ranks 165 of 583.
Learn more
zone vs. frost date explains why Zone 8a and Cambridge's frost date answer different questions, and the frost range explains how to read the range around Cambridge's dates instead of trusting one.