Norway, MI 49852 Frost Dates
When can you plant in Norway, MI?
The last spring frost here typically falls around 05/17, about 262 days from today. The first fall frost typically arrives around 10/01, about 135 frost-free days later.
Zone 5a (-20 to -15°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 Norway, not a forecast for this year.
What to do before the first frost
About 5 weeks of growing season left in Norway before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 05/17 isn't a guarantee
05/17 is the middle of 30 years of NOAA records, not a promise. Plant by 05/02 and you're betting against frost in roughly 9 years out of 10. 05/31 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Norway compares
Norway's growing season runs about 135 days, ranking 37,866 of 40,283 US ZIP codes measured here, longest to shortest. Within MI, it ranks 972 of 1,153.
Learn more
local microclimates covers what one yard in Norway can differ from the 49852 normal. zone vs. frost date covers why Zone 5a and Norway's frost date answer different questions.