Goodrich, MI 48438 Frost Dates
Frost dates for Goodrich, MI, ZIP 48438
Around 05/01 is the usual last spring frost, about 246 days away. The first fall frost typically arrives around 10/14, about 164 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 Goodrich, not a forecast for this year.
What to do before the first frost
Zone 6a around Goodrich has about 7 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.
Why 05/01 isn't a guarantee
05/01 is the middle of 30 years of NOAA records, not a promise. Plant by 04/20 and you're betting against frost in roughly 9 years out of 10. 05/18 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Goodrich compares
Goodrich's growing season runs about 164 days, ranking 30,999 of 40,283 US ZIP codes measured here, longest to shortest. Within MI, it ranks 487 of 1,153.
Learn more
local microclimates explains what one yard in Goodrich can differ from the 48438 normal, and zone vs. frost date explains why Zone 6a and Goodrich's frost date answer different questions.