North Bay, WI 53402 Frost Dates
Frost dates for North Bay, WI, ZIP 53402
Around 04/20 is the usual last spring frost, about 235 days away. The first fall frost typically arrives around 10/24, about 184 frost-free days later.
North Bay sits in USDA Zone 6a (-10 to -5°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 6a around North Bay has about 8 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.
How much risk comes with planting early here
04/20 is the middle of 30 years of NOAA records, not a promise. Plant by 04/07 and you're betting against frost in roughly 9 years out of 10. 05/06 is the safer bet, historically only a 1-in-10 chance of frost that late.
How North Bay compares
At roughly 184 frost-free days, North Bay places 23,664 of 40,283 ZIP codes in this dataset. Within WI, it ranks 24 of 860.
Learn more
local microclimates explains what one yard in North Bay can differ from the 53402 normal, and zone vs. frost date explains why Zone 6a and North Bay's frost date answer different questions.