Northport, MI 49670 Frost Dates
When can you plant in Northport, MI?
Typically, the last spring freeze lands around 05/09, roughly 254 days out. The first fall frost typically arrives around 10/26, about 169 frost-free days later.
Northport 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 Northport before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Northport's last frost
05/09 is the middle of 30 years of NOAA records, not a promise. Plant by 04/24 and you're betting against frost in roughly 9 years out of 10. 05/24 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Northport compares
Northport's growing season runs about 169 days, ranking 29,565 of 40,283 US ZIP codes measured here, longest to shortest. Within MI, it ranks 348 of 1,153.
Learn more
local microclimates covers what one yard in Northport can differ from the 49670 normal. zone vs. frost date covers why Zone 6b and Northport's frost date answer different questions.