Frederick, MD 21703 Frost Dates
Frederick, 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 11/06, roughly 218 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Frederick in Zone 7b (5 to 10°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 10 weeks until Frederick'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 03/17 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.
Frederick against the rest of the dataset
At roughly 218 frost-free days, Frederick places 13,174 of 40,283 ZIP codes in this dataset. Within MD, it ranks 243 of 583.
Learn more
Before leaning on 21703's figures: zone vs. frost date explains why Zone 7b and Frederick's frost date answer different questions, while the frost range explains how to read the range around Frederick's dates instead of trusting one.