Pierson, MI 49347 Frost Dates
Pierson, MI: when does the frost end?
The last spring frost here typically falls around 05/18, about 263 days from today. Fall's first freeze usually shows up around 09/28, roughly 133 days after the last spring frost.
Zone 5b (-15 to -10°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 Pierson, not a forecast for this year.
Stretching the season past the first frost
With roughly 4 weeks until Pierson's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Pierson's last frost
05/18 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/29 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/03 and only about 1 year in 10 sees frost after that.
Pierson against the rest of the dataset
Pierson's growing season runs about 133 days, ranking 38,141 of 40,283 US ZIP codes measured here, longest to shortest. Within MI, it ranks 1,018 of 1,153.
Learn more
Before leaning on 49347's figures: local microclimates explains what one yard in Pierson can differ from the 49347 normal, while zone vs. frost date explains why Zone 5b and Pierson's frost date answer different questions.