Glen Echo, MD 20812 Frost Dates
Frost dates for Glen Echo, MD, ZIP 20812
Around 04/09 is the usual last spring frost, about 224 days away. The first fall frost typically arrives around 10/31, about 202 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 Glen Echo, not a forecast for this year.
What to do before the first frost
Zone 7b around Glen Echo has about 9 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 Glen Echo's last frost
04/09 is the middle of 30 years of NOAA records, not a promise. Plant by 03/27 and you're betting against frost in roughly 9 years out of 10. 04/26 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Glen Echo compares
At roughly 202 frost-free days, Glen Echo places 17,355 of 40,283 ZIP codes in this dataset. Within MD, it ranks 437 of 583.
Learn more
zone vs. frost date explains why Zone 7b and Glen Echo's frost date answer different questions, and the frost range explains how to read the range around Glen Echo's dates instead of trusting one.