Springport, MI 49284 Frost Dates
49284, near Springport, MI: the frost window
Around 04/30 is the usual last spring frost, about 245 days away. Fall's first freeze usually shows up around 10/14, roughly 165 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Springport 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
Springport'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 Springport's last frost
04/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/16 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.
Springport against the rest of the dataset
Springport's growing season runs about 165 days, ranking 30,655 of 40,283 US ZIP codes measured here, longest to shortest. Within MI, it ranks 464 of 1,153.
Learn more
Two guides worth reading on 49284: zone vs. frost date, on why Zone 6a and Springport's frost date answer different questions, and the frost range, on how to read the range around Springport's dates instead of trusting one.