Shelly, MN 56581 Frost Dates
Shelly, MN: when does the frost end?
Around 05/02 is the usual last spring frost, about 247 days away. Fall's first freeze usually shows up around 10/09, roughly 158 days after the last spring frost.
Shelly sits in USDA Zone 4a (-30 to -25°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 6 weeks until Shelly'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
05/02 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/15 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.
Shelly against the rest of the dataset
At roughly 158 frost-free days, Shelly places 33,156 of 40,283 ZIP codes in this dataset. Within MN, it ranks 298 of 943.
Learn more
Before leaning on 56581's figures: zone vs. frost date explains why Zone 4a and Shelly's frost date answer different questions, while the frost range explains how to read the range around Shelly's dates instead of trusting one.