Adrian, MI 49221 Frost Dates
Adrian, 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 10/15, roughly 164 days after the last spring frost.
Adrian 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 Adrian's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Adrian's last frost
05/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/18 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/17 and only about 1 year in 10 sees frost after that.
Adrian against the rest of the dataset
Adrian's growing season runs about 164 days, ranking 30,857 of 40,283 US ZIP codes measured here, longest to shortest. Within MI, it ranks 471 of 1,153.
Learn more
Before leaning on 49221's figures: local microclimates explains what one yard in Adrian can differ from the 49221 normal, while zone vs. frost date explains why Zone 6a and Adrian's frost date answer different questions.