Troy, MI 48098 Frost Dates
Troy, MI: when does the frost end?
The last spring frost here typically falls around 05/01, about 246 days from today. Fall's first freeze usually shows up around 10/17, roughly 165 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Troy 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 7 weeks until Troy'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 04/19 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.
Troy against the rest of the dataset
At roughly 165 frost-free days, Troy places 30,481 of 40,283 ZIP codes in this dataset. Within MI, it ranks 426 of 1,153.
Learn more
Before leaning on 48098's figures: local microclimates explains what one yard in Troy can differ from the 48098 normal, while zone vs. frost date explains why Zone 6b and Troy's frost date answer different questions.