Harper Woods, MI 48225 Frost Dates
When can you plant in Harper Woods, MI?
Typically, the last spring freeze lands around 04/29, roughly 244 days out. The first fall frost typically arrives around 10/22, about 176 frost-free days later.
Harper Woods sits in USDA Zone 6b (-5 to 0°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 8 weeks of growing season left in Harper Woods before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
04/29 is the middle of 30 years of NOAA records, not a promise. Plant by 04/15 and you're betting against frost in roughly 9 years out of 10. 05/13 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Harper Woods compares
At roughly 176 frost-free days, Harper Woods places 26,395 of 40,283 ZIP codes in this dataset. Within MI, it ranks 115 of 1,153.
Learn more
local microclimates covers what one yard in Harper Woods can differ from the 48225 normal. zone vs. frost date covers why Zone 6b and Harper Woods's frost date answer different questions.