Rose City, MI 48635 Frost Dates
48635, near Rose City, MI: the frost window
The last spring frost here typically falls around 05/21, about 266 days from today. Fall's first freeze usually shows up around 09/29, roughly 129 days after the last spring frost.
Rose City sits in USDA Zone 5a (-20 to -15°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
Rose City's growing season runs out in roughly 5 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
05/21 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/05 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/05 and only about 1 year in 10 sees frost after that.
Rose City against the rest of the dataset
Rose City's growing season runs about 129 days, ranking 38,480 of 40,283 US ZIP codes measured here, longest to shortest. Within MI, it ranks 1,040 of 1,153.
Learn more
Two guides worth reading on 48635: local microclimates, on what one yard in Rose City can differ from the 48635 normal, and zone vs. frost date, on why Zone 5a and Rose City's frost date answer different questions.