Glen Echo, MD 20817 Frost Dates
Glen Echo, MD: when does the frost end?
The last spring frost here typically falls around 04/09, about 224 days from today. Fall's first freeze usually shows up around 10/31, roughly 202 days after the last spring frost.
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.
Stretching the season past the first frost
With roughly 9 weeks until Glen Echo's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/09 isn't a guarantee
04/09 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/27 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/26 and only about 1 year in 10 sees frost after that.
Glen Echo against the rest of the dataset
About 202 days separate Glen Echo's last and first frost, putting it 17,356 of 40,283 ZIP codes nationally. Within MD, it ranks 438 of 583.
Learn more
Before leaning on 20817's figures: zone vs. frost date explains why Zone 7b and Glen Echo's frost date answer different questions, while the frost range explains how to read the range around Glen Echo's dates instead of trusting one.