Eagle River, WI 54561 Frost Dates
When can you plant in Eagle River, WI?
Typically, the last spring freeze lands around 05/19, roughly 264 days out. The first fall frost typically arrives around 10/03, about 136 frost-free days later.
The USDA Plant Hardiness Zone Map puts Eagle River 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 Eagle River 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
05/19 is the middle of 30 years of NOAA records, not a promise. Plant by 05/05 and you're betting against frost in roughly 9 years out of 10. 05/31 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Eagle River compares
At roughly 136 frost-free days, Eagle River places 37,708 of 40,283 ZIP codes in this dataset. Within WI, it ranks 758 of 860.
Learn more
local microclimates covers what one yard in Eagle River can differ from the 54561 normal. zone vs. frost date covers why Zone 4b and Eagle River's frost date answer different questions.