Oconto, WI 54153 Frost Dates
When can you plant in Oconto, WI?
Around 05/09 is the usual last spring frost, about 254 days away. The first fall frost typically arrives around 10/06, about 150 frost-free days later.
The USDA Plant Hardiness Zone Map puts Oconto 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 Oconto 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 04/25 and you're betting against frost in roughly 9 years out of 10. 05/23 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Oconto compares
Oconto's growing season runs about 150 days, ranking 35,280 of 40,283 US ZIP codes measured here, longest to shortest. Within WI, it ranks 562 of 860.
Learn more
the frost range covers how to read the range around Oconto's dates instead of trusting one. local microclimates covers what one yard in Oconto can differ from the 54153 normal.