Dearborn Heights, MI 48223 Frost Dates
Dearborn Heights, MI: when does the frost end?
Typically, the last spring freeze lands around 04/27, roughly 242 days out. Fall's first freeze usually shows up around 10/25, roughly 181 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Dearborn Heights in Zone 6b (-5 to 0°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 8 weeks until Dearborn Heights'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
04/27 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/12 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/11 and only about 1 year in 10 sees frost after that.
Dearborn Heights against the rest of the dataset
At roughly 181 frost-free days, Dearborn Heights places 24,435 of 40,283 ZIP codes in this dataset. Within MI, it ranks 75 of 1,153.
Learn more
Before leaning on 48223's figures: local microclimates explains what one yard in Dearborn Heights can differ from the 48223 normal, while zone vs. frost date explains why Zone 6b and Dearborn Heights's frost date answer different questions.