Edmonston, MD 20781 Frost Dates
Frost dates for Edmonston, MD, ZIP 20781
The last spring frost here typically falls around 03/29, about 213 days from today. The first fall frost typically arrives around 11/08, about 224 frost-free days later.
Zone 7b (5 to 10°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 Edmonston, not a forecast for this year.
What to do before the first frost
Zone 7b around Edmonston 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 Edmonston's last frost
03/29 is the middle of 30 years of NOAA records, not a promise. Plant by 03/15 and you're betting against frost in roughly 9 years out of 10. 04/11 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Edmonston compares
Edmonston's growing season runs about 224 days, ranking 11,909 of 40,283 US ZIP codes measured here, longest to shortest. Within MD, it ranks 127 of 583.
Learn more
zone vs. frost date explains why Zone 7b and Edmonston's frost date answer different questions, and the frost range explains how to read the range around Edmonston's dates instead of trusting one.