Washburn, WI 54844 Frost Dates
Washburn, WI: when does the frost end?
Around 05/23 is the usual last spring frost, about 268 days away. Fall's first freeze usually shows up around 10/02, roughly 131 days after the last spring frost.
Zone 4b (-25 to -20°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 Washburn, not a forecast for this year.
Stretching the season past the first frost
With roughly 5 weeks until Washburn's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
05/23 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/08 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/05 and only about 1 year in 10 sees frost after that.
Washburn against the rest of the dataset
Washburn's growing season runs about 131 days, ranking 38,280 of 40,283 US ZIP codes measured here, longest to shortest. Within WI, it ranks 788 of 860.
Learn more
Before leaning on 54844's figures: zone vs. frost date explains why Zone 4b and Washburn's frost date answer different questions, while the frost range explains how to read the range around Washburn's dates instead of trusting one.