Southfield, MI 48219 Frost Dates
48219, near Southfield, MI: the frost window
Typically, the last spring freeze lands around 05/01, roughly 246 days out. 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 Southfield in Zone 6b (-5 to 0°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
Southfield'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 Southfield'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.
Southfield against the rest of the dataset
About 165 days separate Southfield's last and first frost, putting it 30,488 of 40,283 ZIP codes nationally. Within MI, it ranks 433 of 1,153.
Learn more
Two guides worth reading on 48219: zone vs. frost date, on why Zone 6b and Southfield's frost date answer different questions, and the frost range, on how to read the range around Southfield's dates instead of trusting one.