Washburn, WI 54827 Frost Dates
When can you plant in Washburn, WI?
Around 05/23 is the usual last spring frost, about 268 days away. The first fall frost typically arrives around 10/02, about 131 frost-free days later.
The USDA Plant Hardiness Zone Map puts Washburn in Zone 4b (-25 to -20°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 5 weeks of growing season left in Washburn before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
05/23 is the middle of 30 years of NOAA records, not a promise. Plant by 05/08 and you're betting against frost in roughly 9 years out of 10. 06/05 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Washburn compares
About 131 days separate Washburn's last and first frost, putting it 38,279 of 40,283 ZIP codes nationally. Within WI, it ranks 787 of 860.
Learn more
the frost range covers how to read the range around Washburn's dates instead of trusting one. local microclimates covers what one yard in Washburn can differ from the 54827 normal.