Romulus, MI 48174 Frost Dates
48174, near Romulus, MI: the frost window
The last spring frost here typically falls around 04/20, about 235 days from today. Fall's first freeze usually shows up around 10/27, roughly 188 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Romulus 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
Romulus's growing season runs out in roughly 9 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
04/20 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/06 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/08 and only about 1 year in 10 sees frost after that.
Romulus against the rest of the dataset
At roughly 188 frost-free days, Romulus places 21,863 of 40,283 ZIP codes in this dataset. Within MI, it ranks 50 of 1,153.
Learn more
Two guides worth reading on 48174: local microclimates, on what one yard in Romulus can differ from the 48174 normal, and zone vs. frost date, on why Zone 6b and Romulus's frost date answer different questions.