Bruce, WI 54819 Frost Dates
When can you plant in Bruce, WI?
Around 05/09 is the usual last spring frost, about 254 days away. The first fall frost typically arrives around 09/29, about 140 frost-free days later.
The USDA Plant Hardiness Zone Map puts Bruce 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 Bruce 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
05/09 is the middle of 30 years of NOAA records, not a promise. Plant by 04/26 and you're betting against frost in roughly 9 years out of 10. 05/27 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Bruce compares
Bruce's growing season runs about 140 days, ranking 37,103 of 40,283 US ZIP codes measured here, longest to shortest. Within WI, it ranks 716 of 860.
Learn more
local microclimates covers what one yard in Bruce can differ from the 54819 normal. zone vs. frost date covers why Zone 4b and Bruce's frost date answer different questions.