Wykoff, MN 55990 Frost Dates
Wykoff, MN: when does the frost end?
The last spring frost here typically falls around 05/14, about 259 days from today. Fall's first freeze usually shows up around 09/28, roughly 136 days after the last spring frost.
Wykoff sits in USDA Zone 4b (-25 to -20°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 4 weeks until Wykoff'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
05/14 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/01 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/27 and only about 1 year in 10 sees frost after that.
Wykoff against the rest of the dataset
About 136 days separate Wykoff's last and first frost, putting it 37,773 of 40,283 ZIP codes nationally. Within MN, it ranks 799 of 943.
Learn more
Before leaning on 55990's figures: local microclimates explains what one yard in Wykoff can differ from the 55990 normal, while zone vs. frost date explains why Zone 4b and Wykoff's frost date answer different questions.