Saginaw, MI 48606 Frost Dates
Frost dates for Saginaw, MI, ZIP 48606
The last spring frost here typically falls around 04/29, about 244 days from today. The first fall frost typically arrives around 10/21, about 175 frost-free days later.
Zone 6a (-10 to -5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Saginaw, not a forecast for this year.
What to do before the first frost
Zone 6a around Saginaw has about 8 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
04/29 is the middle of 30 years of NOAA records, not a promise. Plant by 04/14 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 Saginaw compares
About 175 days separate Saginaw's last and first frost, putting it 26,747 of 40,283 ZIP codes nationally. Within MI, it ranks 130 of 1,153.
Learn more
local microclimates explains what one yard in Saginaw can differ from the 48606 normal, and zone vs. frost date explains why Zone 6a and Saginaw's frost date answer different questions.