Rothbury, MI 49452 Frost Dates
Rothbury, MI: when does the frost end?
The last spring frost here typically falls around 05/19, about 264 days from today. Fall's first freeze usually shows up around 10/04, roughly 136 days after the last spring frost.
Rothbury 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 5 weeks until Rothbury's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Rothbury's last frost
05/19 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/01 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/06 and only about 1 year in 10 sees frost after that.
Rothbury against the rest of the dataset
About 136 days separate Rothbury's last and first frost, putting it 37,772 of 40,283 ZIP codes nationally. Within MI, it ranks 958 of 1,153.
Learn more
Before leaning on 49452's figures: zone vs. frost date explains why Zone 6a and Rothbury's frost date answer different questions, while the frost range explains how to read the range around Rothbury's dates instead of trusting one.