Baltimore, MD 21213 Frost Dates
Baltimore, MD: when does the frost end?
The last spring frost here typically falls around 03/24, about 208 days from today. Fall's first freeze usually shows up around 11/21, roughly 244 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Baltimore in Zone 8a (10 to 15°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 12 weeks until Baltimore's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Baltimore's last frost
03/24 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/08 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/04 and only about 1 year in 10 sees frost after that.
Baltimore against the rest of the dataset
At roughly 244 frost-free days, Baltimore places 8,153 of 40,283 ZIP codes in this dataset. Within MD, it ranks 22 of 583.
Learn more
Before leaning on 21213's figures: local microclimates explains what one yard in Baltimore can differ from the 21213 normal, while zone vs. frost date explains why Zone 8a and Baltimore's frost date answer different questions.