De Pere, WI 54344 Frost Dates
When can you plant in De Pere, WI?
The last spring frost here typically falls around 04/30, about 245 days from today. 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.
Why 04/30 isn't a guarantee
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 31,971 of 40,283 US ZIP codes measured here, longest to shortest. Within WI, it ranks 310 of 860.
Learn more
local microclimates covers what one yard in De Pere can differ from the 54344 normal. zone vs. frost date covers why Zone 5b and De Pere's frost date answer different questions.