South Lyon, MI 48165 Frost Dates
When can you plant in South Lyon, MI?
The last spring frost here typically falls around 05/06, about 251 days from today. The first fall frost typically arrives around 10/12, about 157 frost-free days later.
South Lyon sits in USDA Zone 6a (-10 to -5°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 6 weeks of growing season left in South Lyon before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 05/06 isn't a guarantee
05/06 is the middle of 30 years of NOAA records, not a promise. Plant by 04/21 and you're betting against frost in roughly 9 years out of 10. 05/22 is the safer bet, historically only a 1-in-10 chance of frost that late.
How South Lyon compares
At roughly 157 frost-free days, South Lyon places 33,258 of 40,283 ZIP codes in this dataset. Within MI, it ranks 700 of 1,153.
Learn more
the frost range covers how to read the range around South Lyon's dates instead of trusting one. local microclimates covers what one yard in South Lyon can differ from the 48165 normal.