When to plant in Suamico, WI
USDA Zone 5bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Suamico, Wisconsin — all computed from Suamico's nearest NOAA weather station.
Zone 5b means Suamico sees real winter cold, but a good range of perennials survive; the frost dates above govern when annual vegetables go out.
Frost probability
GREEN BAY BOTANICAL · 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 Suamico’s own odds, recorded at GREEN BAY BOTANICAL.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 31 | May 19 | May 4 | Sep 15 | Sep 28 | Oct 12 |
| 32°F | May 22 | May 7 | Apr 24 | Sep 23 | Oct 9 | Oct 25 |
| 28°F | May 12 | Apr 27 | Apr 10 | Oct 5 | Oct 25 | Nov 7 |
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 Suamico, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 16 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.
Suamico planting FAQ
When is the last spring frost in Suamico, WI?
On average, the last spring frost in Suamico is around May 7 (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 Suamico, WI?
Expect Suamico'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 Suamico in?
Suamico 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 Suamico?
There are roughly 155 frost-free days in Suamico (a moderate growing season), running from the average last frost around May 7 to the first fall frost near October 9.
When should I plant tomatoes in Suamico?
In Suamico, start tomato seeds indoors around March 12–March 26, then transplant seedlings outdoors around May 14 once the danger of frost has passed.
Never miss a window in Suamico
An email when it’s time to start seeds, transplant, and sow — timed to Suamico’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reachFrost dates recorded at GREEN BAY BOTANICAL, 12 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 Suamico, WI — Frost Dates & Zone 5b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00473271. Retrieved from https://blissgarden.com/wisconsin/suamico.