Washington Grove, MD 20855 Frost Dates
Washington Grove, MD: when does the frost end?
Around 04/01 is the usual last spring frost, about 216 days away. Fall's first freeze usually shows up around 11/06, roughly 219 days after the last spring frost.
Washington Grove sits in USDA Zone 7b (5 to 10°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
With roughly 10 weeks until Washington Grove's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
04/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/19 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/15 and only about 1 year in 10 sees frost after that.
Washington Grove against the rest of the dataset
About 219 days separate Washington Grove's last and first frost, putting it 13,089 of 40,283 ZIP codes nationally. Within MD, it ranks 233 of 583.
Learn more
Before leaning on 20855's figures: zone vs. frost date explains why Zone 7b and Washington Grove's frost date answer different questions, while the frost range explains how to read the range around Washington Grove's dates instead of trusting one.