Merrill, MI 48637 Frost Dates
Merrill, MI: when does the frost end?
Around 04/29 is the usual last spring frost, about 244 days away. Fall's first freeze usually shows up around 10/16, roughly 167 days after the last spring frost.
Merrill 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
With roughly 7 weeks until Merrill'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
04/29 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.
Merrill against the rest of the dataset
At roughly 167 frost-free days, Merrill places 30,125 of 40,283 ZIP codes in this dataset. Within MI, it ranks 377 of 1,153.
Learn more
Before leaning on 48637's figures: zone vs. frost date explains why Zone 6a and Merrill's frost date answer different questions, while the frost range explains how to read the range around Merrill's dates instead of trusting one.