Cottage Grove, WI 53527 Frost Dates
Cottage Grove, WI: when does the frost end?
Typically, the last spring freeze lands around 05/01, roughly 246 days out. Fall's first freeze usually shows up around 10/10, roughly 160 days after the last spring frost.
Zone 5b (-15 to -10°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Cottage Grove, not a forecast for this year.
Stretching the season past the first frost
With roughly 6 weeks until Cottage Grove's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Cottage Grove's last frost
05/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/16 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/16 and only about 1 year in 10 sees frost after that.
Cottage Grove against the rest of the dataset
About 160 days separate Cottage Grove's last and first frost, putting it 32,273 of 40,283 ZIP codes nationally. Within WI, it ranks 340 of 860.
Learn more
Before leaning on 53527's figures: local microclimates explains what one yard in Cottage Grove can differ from the 53527 normal, while zone vs. frost date explains why Zone 5b and Cottage Grove's frost date answer different questions.