Juneau, WI 53099 Frost Dates
Frost dates for Juneau, WI, ZIP 53099
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.
Juneau sits in USDA Zone 5a (-20 to -15°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
Zone 5a around Juneau has about 6 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around Juneau's last frost
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
Juneau's growing season runs about 158 days, ranking 32,988 of 40,283 US ZIP codes measured here, longest to shortest. Within WI, it ranks 368 of 860.
Learn more
zone vs. frost date explains why Zone 5a and Juneau's frost date answer different questions, and the frost range explains how to read the range around Juneau's dates instead of trusting one.