Adams, MN 55909 Frost Dates
Adams, MN: when does the frost end?
Typically, the last spring freeze lands around 05/06, roughly 251 days out. Fall's first freeze usually shows up around 10/01, roughly 146 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Adams in Zone 4b (-25 to -20°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 5 weeks until Adams's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Adams's last frost
05/06 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/23 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/18 and only about 1 year in 10 sees frost after that.
Adams against the rest of the dataset
About 146 days separate Adams's last and first frost, putting it 36,082 of 40,283 ZIP codes nationally. Within MN, it ranks 623 of 943.
Learn more
Before leaning on 55909's figures: local microclimates explains what one yard in Adams can differ from the 55909 normal, while zone vs. frost date explains why Zone 4b and Adams's frost date answer different questions.