De Pere, WI 54115 Frost Dates
When can you plant in De Pere, WI?
Around 04/30 is the usual last spring frost, about 245 days away. The first fall frost typically arrives around 10/09, about 161 frost-free days later.
Zone 5b (-15 to -10°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for De Pere, not a forecast for this year.
What to do before the first frost
About 6 weeks of growing season left in De Pere 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
04/30 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. 05/16 is the safer bet, historically only a 1-in-10 chance of frost that late.
How De Pere compares
De Pere's growing season runs about 161 days, ranking 31,970 of 40,283 US ZIP codes measured here, longest to shortest. Within WI, it ranks 309 of 860.
Learn more
local microclimates covers what one yard in De Pere can differ from the 54115 normal. zone vs. frost date covers why Zone 5b and De Pere's frost date answer different questions.