Byron, MI 48418 Frost Dates
Byron, 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 10/11, roughly 159 days after the last spring frost.
Byron sits in USDA Zone 6a (-10 to -5°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
With roughly 6 weeks until Byron's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Byron's last frost
05/03 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/21 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/19 and only about 1 year in 10 sees frost after that.
Byron against the rest of the dataset
About 159 days separate Byron's last and first frost, putting it 32,731 of 40,283 ZIP codes nationally. Within MI, it ranks 656 of 1,153.
Learn more
Before leaning on 48418's figures: local microclimates explains what one yard in Byron can differ from the 48418 normal, while zone vs. frost date explains why Zone 6a and Byron's frost date answer different questions.