Flint, MI 48505 Frost Dates
48505, near Flint, MI: the frost window
Around 05/03 is the usual last spring frost, about 248 days away. Fall's first freeze usually shows up around 10/13, roughly 162 days after the last spring frost.
Flint sits in USDA Zone 6a (-10 to -5°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
Flint'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 Flint's last frost
05/03 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/20 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/20 and only about 1 year in 10 sees frost after that.
Flint against the rest of the dataset
About 162 days separate Flint's last and first frost, putting it 31,582 of 40,283 ZIP codes nationally. Within MI, it ranks 539 of 1,153.
Learn more
Two guides worth reading on 48505: local microclimates, on what one yard in Flint can differ from the 48505 normal, and zone vs. frost date, on why Zone 6a and Flint's frost date answer different questions.