Juneau, WI 53039 Frost Dates
When can you plant in Juneau, WI?
The last spring frost here typically falls around 05/01, about 246 days from today. The first fall frost typically arrives around 10/10, about 158 frost-free days later.
The USDA Plant Hardiness Zone Map puts Juneau in Zone 5a (-20 to -15°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 6 weeks of growing season left in Juneau 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
05/01 is the middle of 30 years of NOAA records, not a promise. Plant by 04/16 and you're betting against frost in roughly 9 years out of 10. 05/19 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Juneau compares
About 158 days separate Juneau's last and first frost, putting it 32,987 of 40,283 ZIP codes nationally. Within WI, it ranks 367 of 860.
Learn more
local microclimates covers what one yard in Juneau can differ from the 53039 normal. zone vs. frost date covers why Zone 5a and Juneau's frost date answer different questions.