Cologne, MN 55322 Frost Dates
Cologne, MN: when does the frost end?
Typically, the last spring freeze lands around 05/05, roughly 250 days out. Fall's first freeze usually shows up around 10/05, roughly 151 days after the last spring frost.
Cologne 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 5 weeks until Cologne's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Cologne's last frost
05/05 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 05/19 and only about 1 year in 10 sees frost after that.
Cologne against the rest of the dataset
About 151 days separate Cologne's last and first frost, putting it 35,058 of 40,283 ZIP codes nationally. Within MN, it ranks 491 of 943.
Learn more
Before leaning on 55322's figures: local microclimates explains what one yard in Cologne can differ from the 55322 normal, while zone vs. frost date explains why Zone 4b and Cologne's frost date answer different questions.