Auburn, MI 48631 Frost Dates
Auburn, MI: when does the frost end?
The last spring frost here typically falls around 05/03, about 248 days from today. Fall's first freeze usually shows up around 10/14, roughly 161 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 Auburn, not a forecast for this year.
Stretching the season past the first frost
With roughly 7 weeks until Auburn's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/03 isn't a guarantee
05/03 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/20 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.
Auburn against the rest of the dataset
At roughly 161 frost-free days, Auburn places 32,071 of 40,283 ZIP codes in this dataset. Within MI, it ranks 577 of 1,153.
Learn more
Before leaning on 48631's figures: local microclimates explains what one yard in Auburn can differ from the 48631 normal, while zone vs. frost date explains why Zone 6a and Auburn's frost date answer different questions.