Lyons, MI 48851 Frost Dates
Lyons, MI: when does the frost end?
Typically, the last spring freeze lands around 05/03, roughly 248 days out. Fall's first freeze usually shows up around 10/12, roughly 161 days after the last spring frost.
Lyons 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 Lyons'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 04/17 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/21 and only about 1 year in 10 sees frost after that.
Lyons against the rest of the dataset
About 161 days separate Lyons's last and first frost, putting it 32,114 of 40,283 ZIP codes nationally. Within MI, it ranks 592 of 1,153.
Learn more
Before leaning on 48851's figures: zone vs. frost date explains why Zone 6a and Lyons's frost date answer different questions, while the frost range explains how to read the range around Lyons's dates instead of trusting one.