Baltimore, MD 21060 Frost Dates
Baltimore, MD: when does the frost end?
Typically, the last spring freeze lands around 04/10, roughly 225 days out. Fall's first freeze usually shows up around 10/31, roughly 204 days after the last spring frost.
Baltimore sits in USDA Zone 8a (10 to 15°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 9 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
04/10 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 04/25 and only about 1 year in 10 sees frost after that.
Baltimore against the rest of the dataset
About 204 days separate Baltimore's last and first frost, putting it 16,435 of 40,283 ZIP codes nationally. Within MD, it ranks 359 of 583.
Learn more
Before leaning on 21060's figures: zone vs. frost date explains why Zone 8a 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.