Flint, MI 48503 Frost Dates
Flint, MI: when does the frost end?
The last spring frost here typically falls around 05/06, about 251 days from today. Fall's first freeze usually shows up around 10/10, roughly 155 days after the last spring frost.
Zone 6a (-10 to -5°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 Flint, not a forecast for this year.
Stretching the season past the first frost
With roughly 6 weeks until Flint's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
05/06 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/21 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/23 and only about 1 year in 10 sees frost after that.
Flint against the rest of the dataset
At roughly 155 frost-free days, Flint places 33,902 of 40,283 ZIP codes in this dataset. Within MI, it ranks 766 of 1,153.
Learn more
Before leaning on 48503's figures: zone vs. frost date explains why Zone 6a and Flint's frost date answer different questions, while the frost range explains how to read the range around Flint's dates instead of trusting one.