When to plant in Two Rivers, WI
USDA Zone 5bTwo Rivers, 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 Two Rivers 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 Two Rivers is now 5 days later than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
TWO RIVERS · 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 Two Rivers’s own odds, recorded at TWO RIVERS.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 22 | May 8 | Apr 27 | Sep 26 | Oct 8 | Oct 22 |
| 32°F | May 10 | Apr 27 | Apr 14 | Oct 4 | Oct 21 | Nov 3 |
| 28°F | Apr 27 | Apr 14 | Apr 2 | Oct 18 | Nov 1 | Nov 14 |
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 Two Rivers, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 29 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.
Two Rivers planting FAQ
When is the last spring frost in Two Rivers, WI?
Plan for the last spring frost in Two Rivers 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 Two Rivers, WI?
Expect Two Rivers's first fall frost near October 21 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Two Rivers in?
Two Rivers 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 Two Rivers?
There are roughly 177 frost-free days in Two Rivers (a moderate growing season), running from the average last frost around April 27 to the first fall frost near October 21.
When should I plant tomatoes in Two Rivers?
In Two Rivers, start tomato seeds indoors around March 2–March 16, then transplant seedlings outdoors around May 4 once the danger of frost has passed.
Never miss a window in Two Rivers
An email when it’s time to start seeds, transplant, and sow — timed to Two Rivers’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reachFrost dates recorded at TWO RIVERS, 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 Two Rivers, WI — Frost Dates & Zone 5b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00478672. Retrieved from https://blissgarden.com/wisconsin/two-rivers.