Saginaw, MI 48605 Frost Dates
48605, near Saginaw, MI: the frost window
Around 04/26 is the usual last spring frost, about 241 days away. Fall's first freeze usually shows up around 10/17, roughly 172 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Saginaw in Zone 6a (-10 to -5°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
Saginaw'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
04/26 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/13 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/13 and only about 1 year in 10 sees frost after that.
Saginaw against the rest of the dataset
At roughly 172 frost-free days, Saginaw places 28,161 of 40,283 ZIP codes in this dataset. Within MI, it ranks 249 of 1,153.
Learn more
Two guides worth reading on 48605: local microclimates, on what one yard in Saginaw can differ from the 48605 normal, and zone vs. frost date, on why Zone 6a and Saginaw's frost date answer different questions.