When to plant in Pewaukee, WI
USDA Zone 5bEverything below — frost dates, hardiness zone, and what to plant when in Pewaukee, Wisconsin — is derived from the closest NOAA station with complete climate normals.
In zone 5b, Pewaukee gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
Frost probability
BROOKFIELD WWTP · 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 Pewaukee’s own odds, recorded at BROOKFIELD WWTP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 29 | May 10 | Apr 28 | Sep 21 | Oct 3 | Oct 17 |
| 32°F | May 15 | Apr 30 | Apr 16 | Sep 28 | Oct 14 | Oct 27 |
| 28°F | May 3 | Apr 19 | Apr 5 | Oct 10 | 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 Pewaukee, 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.
Pewaukee planting FAQ
When is the last spring frost in Pewaukee, WI?
Plan for the last spring frost in Pewaukee around April 30 (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 Pewaukee, WI?
The first fall frost in Pewaukee typically arrives around October 14 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Pewaukee in?
Pewaukee 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 Pewaukee?
Pewaukee has about 167 frost-free days — a moderate growing season — between the average last spring frost (April 30) and first fall frost (October 14).
When should I plant tomatoes in Pewaukee?
For Pewaukee, sow tomatoes indoors about March 5–March 19 and move the seedlings out around May 7, after the last spring frost.
Never miss a window in Pewaukee
An email when it’s time to start seeds, transplant, and sow — timed to Pewaukee’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Waukesha · 6 km
- Sussex · 8 km
- Lisbon · 10 km
- Brookfield · 10 km
- New Berlin · 14 km
- Menomonee Falls · 14 km
- Wauwatosa · 17 km
- West Allis · 19 km
Frost dates recorded at BROOKFIELD WWTP, 6 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 Pewaukee, WI — Frost Dates & Zone 5b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00471062. Retrieved from https://blissgarden.com/wisconsin/pewaukee.