Jackson, MI 49201 Frost Dates
Jackson, MI: when does the frost end?
Typically, the last spring freeze lands around 05/01, roughly 246 days out. Fall's first freeze usually shows up around 10/14, roughly 164 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 Jackson, not a forecast for this year.
Stretching the season past the first frost
With roughly 7 weeks until Jackson'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
05/01 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 05/18 and only about 1 year in 10 sees frost after that.
Jackson against the rest of the dataset
Jackson's growing season runs about 164 days, ranking 30,851 of 40,283 US ZIP codes measured here, longest to shortest. Within MI, it ranks 466 of 1,153.
Learn more
Before leaning on 49201's figures: local microclimates explains what one yard in Jackson can differ from the 49201 normal, while zone vs. frost date explains why Zone 6a and Jackson's frost date answer different questions.