Rose Creek, MN 55970 Frost Dates
55970, near Rose Creek, MN: the frost window
The last spring frost here typically falls around 04/30, about 245 days from today. Fall's first freeze usually shows up around 10/05, roughly 158 days after the last spring frost.
Zone 4b (-25 to -20°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 Rose Creek, not a forecast for this year.
Stretching the season past the first frost
Rose Creek'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
04/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/14 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/11 and only about 1 year in 10 sees frost after that.
Rose Creek against the rest of the dataset
At roughly 158 frost-free days, Rose Creek places 33,117 of 40,283 ZIP codes in this dataset. Within MN, it ranks 292 of 943.
Learn more
Two guides worth reading on 55970: zone vs. frost date, on why Zone 4b and Rose Creek's frost date answer different questions, and the frost range, on how to read the range around Rose Creek's dates instead of trusting one.