Addison, MI 49253 Frost Dates
Addison, MI: when does the frost end?
Around 05/05 is the usual last spring frost, about 250 days away. Fall's first freeze usually shows up around 10/10, roughly 157 days after the last spring frost.
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 Addison, not a forecast for this year.
Stretching the season past the first frost
With roughly 6 weeks until Addison's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/05 isn't a guarantee
05/05 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/22 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/23 and only about 1 year in 10 sees frost after that.
Addison against the rest of the dataset
About 157 days separate Addison's last and first frost, putting it 33,418 of 40,283 ZIP codes nationally. Within MI, it ranks 732 of 1,153.
Learn more
Before leaning on 49253's figures: local microclimates explains what one yard in Addison can differ from the 49253 normal, while zone vs. frost date explains why Zone 6a and Addison's frost date answer different questions.