Casnovia, MI 49303 Frost Dates
Casnovia, MI: when does the frost end?
The last spring frost here typically falls around 05/14, about 259 days from today. Fall's first freeze usually shows up around 09/29, roughly 135 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Casnovia in Zone 6a (-10 to -5°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 5 weeks until Casnovia's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/14 isn't a guarantee
05/14 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 05/31 and only about 1 year in 10 sees frost after that.
Casnovia against the rest of the dataset
Casnovia's growing season runs about 135 days, ranking 37,914 of 40,283 US ZIP codes measured here, longest to shortest. Within MI, it ranks 982 of 1,153.
Learn more
Before leaning on 49303's figures: local microclimates explains what one yard in Casnovia can differ from the 49303 normal, while zone vs. frost date explains why Zone 6a and Casnovia's frost date answer different questions.