Norway, MI 49831 Frost Dates
Norway, MI: when does the frost end?
Around 05/17 is the usual last spring frost, about 262 days away. Fall's first freeze usually shows up around 10/01, roughly 135 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Norway in Zone 4b (-25 to -20°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 5 weeks until Norway's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
05/17 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/31 and only about 1 year in 10 sees frost after that.
Norway against the rest of the dataset
At roughly 135 frost-free days, Norway places 37,864 of 40,283 ZIP codes in this dataset. Within MI, it ranks 970 of 1,153.
Learn more
Before leaning on 49831's figures: local microclimates explains what one yard in Norway can differ from the 49831 normal, while zone vs. frost date explains why Zone 4b and Norway's frost date answer different questions.