Coon Valley, WI 54623 Frost Dates
Coon Valley, WI: when does the frost end?
Typically, the last spring freeze lands around 04/27, roughly 242 days out. Fall's first freeze usually shows up around 10/13, roughly 167 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Coon Valley in Zone 5a (-20 to -15°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 7 weeks until Coon Valley's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Coon Valley's last frost
04/27 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/12 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/12 and only about 1 year in 10 sees frost after that.
Coon Valley against the rest of the dataset
Coon Valley's growing season runs about 167 days, ranking 30,106 of 40,283 US ZIP codes measured here, longest to shortest. Within WI, it ranks 168 of 860.
Learn more
Before leaning on 54623's figures: local microclimates explains what one yard in Coon Valley can differ from the 54623 normal, while zone vs. frost date explains why Zone 5a and Coon Valley's frost date answer different questions.