Baltimore, MD 21207 Frost Dates
When can you plant in Baltimore, MD?
The last spring frost here typically falls around 04/02, about 217 days from today. The first fall frost typically arrives around 11/07, about 220 frost-free days later.
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.
What to do before the first frost
About 10 weeks of growing season left in Baltimore before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/02 isn't a guarantee
04/02 is the middle of 30 years of NOAA records, not a promise. Plant by 03/20 and you're betting against frost in roughly 9 years out of 10. 04/13 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Baltimore compares
At roughly 220 frost-free days, Baltimore places 12,638 of 40,283 ZIP codes in this dataset. Within MD, it ranks 145 of 583.
Learn more
zone vs. frost date covers why Zone 7b and Baltimore's frost date answer different questions. the frost range covers how to read the range around Baltimore's dates instead of trusting one.