Marshall, MI 49068 Frost Dates
49068, near Marshall, MI: the frost window
The last spring frost here typically falls around 04/30, about 245 days from today. Fall's first freeze usually shows up around 10/19, roughly 170 days after the last spring frost.
Marshall 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
Marshall'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
04/30 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 05/17 and only about 1 year in 10 sees frost after that.
Marshall against the rest of the dataset
Marshall's growing season runs about 170 days, ranking 28,963 of 40,283 US ZIP codes measured here, longest to shortest. Within MI, it ranks 312 of 1,153.
Learn more
Two guides worth reading on 49068: local microclimates, on what one yard in Marshall can differ from the 49068 normal, and zone vs. frost date, on why Zone 6a and Marshall's frost date answer different questions.