Caspian, MI 49915 Frost Dates
Caspian, MI: when does the frost end?
The last spring frost here typically falls around 06/06, about 282 days from today. Fall's first freeze usually shows up around 09/09, roughly 94 days after the last spring frost.
Zone 4a (-30 to -25°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Caspian, not a forecast for this year.
Stretching the season past the first frost
With roughly 2 weeks until Caspian'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
06/06 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/23 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 07/07 and only about 1 year in 10 sees frost after that.
Caspian against the rest of the dataset
About 94 days separate Caspian's last and first frost, putting it 39,843 of 40,283 ZIP codes nationally. Within MI, it ranks 1,152 of 1,153.
Learn more
Before leaning on 49915's figures: local microclimates explains what one yard in Caspian can differ from the 49915 normal, while zone vs. frost date explains why Zone 4a and Caspian's frost date answer different questions.