Bayfield, WI 54850 Frost Dates
When can you plant in Bayfield, 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 Bayfield in Zone 5b (-15 to -10°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 Bayfield before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Bayfield's last frost
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 Bayfield compares
Bayfield's growing season runs about 131 days, ranking 38,320 of 40,283 US ZIP codes measured here, longest to shortest. Within WI, it ranks 798 of 860.
Learn more
local microclimates covers what one yard in Bayfield can differ from the 54850 normal. zone vs. frost date covers why Zone 5b and Bayfield's frost date answer different questions.