Farmington Hills, MI 48331 Frost Dates
48331, near Farmington Hills, MI: the frost window
Around 05/01 is the usual last spring frost, about 246 days away. Fall's first freeze usually shows up around 10/17, roughly 165 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Farmington Hills in Zone 6a (-10 to -5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Farmington Hills's growing season runs out in roughly 7 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 Farmington Hills's last frost
05/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/19 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.
Farmington Hills against the rest of the dataset
About 165 days separate Farmington Hills's last and first frost, putting it 30,483 of 40,283 ZIP codes nationally. Within MI, it ranks 428 of 1,153.
Learn more
Two guides worth reading on 48331: zone vs. frost date, on why Zone 6a and Farmington Hills's frost date answer different questions, and the frost range, on how to read the range around Farmington Hills's dates instead of trusting one.