Baltimore, MD 21204 Frost Dates
Baltimore, MD: when does the frost end?
The last spring frost here typically falls around 04/02, about 217 days from today. Fall's first freeze usually shows up around 11/07, roughly 220 days after the last spring frost.
Baltimore 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 Baltimore'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
04/02 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/20 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/13 and only about 1 year in 10 sees frost after that.
Baltimore against the rest of the dataset
At roughly 220 frost-free days, Baltimore places 12,637 of 40,283 ZIP codes in this dataset. Within MD, it ranks 144 of 583.
Learn more
Before leaning on 21204's figures: zone vs. frost date explains why Zone 7b and Baltimore's frost date answer different questions, while the frost range explains how to read the range around Baltimore's dates instead of trusting one.