Ashland, WI 54861 Frost Dates
Ashland, WI: when does the frost end?
The last spring frost here typically falls around 05/20, about 265 days from today. Fall's first freeze usually shows up around 10/02, roughly 133 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Ashland 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 5 weeks until Ashland's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/20 isn't a guarantee
05/20 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/03 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/03 and only about 1 year in 10 sees frost after that.
Ashland against the rest of the dataset
About 133 days separate Ashland's last and first frost, putting it 38,046 of 40,283 ZIP codes nationally. Within WI, it ranks 785 of 860.
Learn more
Before leaning on 54861's figures: zone vs. frost date explains why Zone 5a and Ashland's frost date answer different questions, while the frost range explains how to read the range around Ashland's dates instead of trusting one.