Accident, MD 21541 Frost Dates
Accident, MD: when does the frost end?
Around 05/09 is the usual last spring frost, about 254 days away. Fall's first freeze usually shows up around 10/11, roughly 155 days after the last spring frost.
Zone 6a (-10 to -5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Accident, not a forecast for this year.
Stretching the season past the first frost
With roughly 6 weeks until Accident's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Accident's last frost
05/09 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/21 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/30 and only about 1 year in 10 sees frost after that.
Accident against the rest of the dataset
Accident's growing season runs about 155 days, ranking 34,118 of 40,283 US ZIP codes measured here, longest to shortest. Within MD, it ranks 583 of 583.
Learn more
Before leaning on 21541's figures: local microclimates explains what one yard in Accident can differ from the 21541 normal, while zone vs. frost date explains why Zone 6a and Accident's frost date answer different questions.