Southfield, MI 48075 Frost Dates
48075, near Southfield, 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.
Zone 6b (-5 to 0°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 Southfield, not a forecast for this year.
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.
How much risk comes with planting early here
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
At roughly 165 frost-free days, Southfield places 30,487 of 40,283 ZIP codes in this dataset. Within MI, it ranks 432 of 1,153.
Learn more
Two guides worth reading on 48075: local microclimates, on what one yard in Southfield can differ from the 48075 normal, and zone vs. frost date, on why Zone 6b and Southfield's frost date answer different questions.