Lake Isabella, MI 48893 Frost Dates
48893, near Lake Isabella, MI: the frost window
The last spring frost here typically falls around 04/30, about 245 days from today. Fall's first freeze usually shows up around 10/20, roughly 171 days after the last spring frost.
Zone 5b (-15 to -10°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 Lake Isabella, not a forecast for this year.
Stretching the season past the first frost
Lake Isabella's growing season runs out in roughly 8 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Lake Isabella's last frost
04/30 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 05/16 and only about 1 year in 10 sees frost after that.
Lake Isabella against the rest of the dataset
About 171 days separate Lake Isabella's last and first frost, putting it 28,682 of 40,283 ZIP codes nationally. Within MI, it ranks 291 of 1,153.
Learn more
Two guides worth reading on 48893: local microclimates, on what one yard in Lake Isabella can differ from the 48893 normal, and zone vs. frost date, on why Zone 5b and Lake Isabella's frost date answer different questions.