Posen, MI 49776 Frost Dates
When can you plant in Posen, MI?
The last spring frost here typically falls around 05/13, about 258 days from today. The first fall frost typically arrives around 10/03, about 141 frost-free days later.
Posen sits in USDA Zone 5b (-15 to -10°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 5 weeks of growing season left in Posen before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Posen's last frost
05/13 is the middle of 30 years of NOAA records, not a promise. Plant by 04/30 and you're betting against frost in roughly 9 years out of 10. 05/30 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Posen compares
About 141 days separate Posen's last and first frost, putting it 36,985 of 40,283 ZIP codes nationally. Within MI, it ranks 909 of 1,153.
Learn more
the frost range covers how to read the range around Posen's dates instead of trusting one. local microclimates covers what one yard in Posen can differ from the 49776 normal.