Le Roy, MI 49655 Frost Dates
49655, near Le Roy, MI: the frost window
Typically, the last spring freeze lands around 05/15, roughly 260 days out. Fall's first freeze usually shows up around 10/01, roughly 139 days after the last spring frost.
Le Roy sits in USDA Zone 5a (-20 to -15°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
Le Roy's growing season runs out in roughly 5 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
05/15 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/30 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/30 and only about 1 year in 10 sees frost after that.
Le Roy against the rest of the dataset
About 139 days separate Le Roy's last and first frost, putting it 37,280 of 40,283 ZIP codes nationally. Within MI, it ranks 918 of 1,153.
Learn more
Two guides worth reading on 49655: local microclimates, on what one yard in Le Roy can differ from the 49655 normal, and zone vs. frost date, on why Zone 5a and Le Roy's frost date answer different questions.