When to plant in De Pere, WI
USDA Zone 5bDe Pere, Wisconsin frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
Zone 5b means De Pere sees real winter cold, but a good range of perennials survive; the frost dates above govern when annual vegetables go out.
The average first fall frost in De Pere is now 6 days later than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
GREEN BAY · 1991–2020The date the last spring and first fall frost occur, by threshold and probability. A 90% date is later in spring — and earlier in fall — than a 10% date; the 50% · 32°F row is what most gardeners plan around. These are De Pere’s own odds, recorded at GREEN BAY.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 27 | May 13 | Apr 29 | Sep 16 | Sep 29 | Oct 12 |
| 32°F | May 16 | Apr 30 | Apr 16 | Sep 24 | Oct 9 | Oct 26 |
| 28°F | May 4 | Apr 17 | Apr 3 | Oct 6 | Oct 24 | Nov 9 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Full-year planting calendar
Each bar is the exact window to take a planting action in De Pere, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 11 km · complete 32°F normalsWhen stations disagree by more than a few days, that spread is real microclimate variation — elevation, water, urban heat. Judge which station best matches your own yard.
De Pere planting FAQ
When is the last spring frost in De Pere, WI?
On average, the last spring frost in De Pere is around April 30 (50% probability at 32°F, from 1991–2020 NOAA normals). Wait until after this date to set out tender plants like tomatoes and peppers.
When is the first fall frost in De Pere, WI?
Expect De Pere's first fall frost near October 9 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is De Pere in?
De Pere is in USDA hardiness zone 5b. In zone 5b, winters are cold — pick cold-hardy varieties and protect tender crops.
How long is the growing season in De Pere?
There are roughly 162 frost-free days in De Pere (a moderate growing season), running from the average last frost around April 30 to the first fall frost near October 9.
When should I plant tomatoes in De Pere?
In De Pere, start tomato seeds indoors around March 5–March 19, then transplant seedlings outdoors around May 7 once the danger of frost has passed.
Never miss a window in De Pere
An email when it’s time to start seeds, transplant, and sow — timed to De Pere’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reachFrost dates recorded at GREEN BAY, 8 km from the city center · 1991–2020 NOAA climate normals · zone from the USDA/PRISM 2023 map. How we compute this.
BlissGarden. "When to Plant in De Pere, WI — Frost Dates & Zone 5b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00014898. Retrieved from https://blissgarden.com/wisconsin/de-pere.