Monroe, MI 48162 Frost Dates
Monroe, MI: when does the frost end?
Around 04/23 is the usual last spring frost, about 238 days away. Fall's first freeze usually shows up around 10/23, roughly 182 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Monroe in Zone 6b (-5 to 0°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
With roughly 8 weeks until Monroe'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
04/23 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/08 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/07 and only about 1 year in 10 sees frost after that.
Monroe against the rest of the dataset
Monroe's growing season runs about 182 days, ranking 24,085 of 40,283 US ZIP codes measured here, longest to shortest. Within MI, it ranks 59 of 1,153.
Learn more
Before leaning on 48162's figures: the frost range explains how to read the range around Monroe's dates instead of trusting one, while local microclimates explains what one yard in Monroe can differ from the 48162 normal.