When to plant in Fond du Lac, WI
USDA Zone 5bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Fond du Lac, Wisconsin — all computed from Fond du Lac's nearest NOAA weather station.
In zone 5b, Fond du Lac gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
Frost probability
FOND DU LAC 2 SW · 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 Fond du Lac’s own odds, recorded at FOND DU LAC 2 SW.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 21 | May 7 | Apr 24 | Sep 23 | Oct 6 | Oct 21 |
| 32°F | May 11 | Apr 27 | Apr 13 | Oct 2 | Oct 19 | Nov 1 |
| 28°F | Apr 28 | Apr 15 | Apr 2 | Oct 16 | Oct 31 | Nov 13 |
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 Fond du Lac, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 4 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.
Fond du Lac planting FAQ
When is the last spring frost in Fond du Lac, WI?
Plan for the last spring frost in Fond du Lac around April 27 (the date it has a 50% chance of a 32°F freeze). Anything frost-sensitive should go out after it.
When is the first fall frost in Fond du Lac, WI?
The first fall frost in Fond du Lac typically arrives around October 19 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Fond du Lac in?
Fond du Lac 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 Fond du Lac?
Fond du Lac has about 175 frost-free days — a moderate growing season — between the average last spring frost (April 27) and first fall frost (October 19).
When should I plant tomatoes in Fond du Lac?
For Fond du Lac, sow tomatoes indoors about March 2–March 16 and move the seedlings out around May 4, after the last spring frost.
Never miss a window in Fond du Lac
An email when it’s time to start seeds, transplant, and sow — timed to Fond du Lac’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reachFrost dates recorded at FOND DU LAC 2 SW, 2 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 Fond du Lac, WI — Frost Dates & Zone 5b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00472842. Retrieved from https://blissgarden.com/wisconsin/fond-du-lac.