Nisswa, MN 56468 Frost Dates
Nisswa, MN: when does the frost end?
The last spring frost here typically falls around 05/02, about 247 days from today. Fall's first freeze usually shows up around 10/06, roughly 156 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Nisswa in Zone 4a (-30 to -25°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 6 weeks until Nisswa'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 04/21 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/14 and only about 1 year in 10 sees frost after that.
Nisswa against the rest of the dataset
At roughly 156 frost-free days, Nisswa places 33,658 of 40,283 ZIP codes in this dataset. Within MN, it ranks 315 of 943.
Learn more
Before leaning on 56468's figures: local microclimates explains what one yard in Nisswa can differ from the 56468 normal, while zone vs. frost date explains why Zone 4a and Nisswa's frost date answer different questions.