When to plant in Oak Park, MI
USDA Zone 6bEverything below — frost dates, hardiness zone, and what to plant when in Oak Park, Michigan — is derived from the closest NOAA station with complete climate normals.
Zone 6b means Oak Park sees real winter cold, but a good range of perennials survive; the frost dates above govern when annual vegetables go out.
Frost probability
DEARBORN #2 · 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 Oak Park’s own odds, recorded at DEARBORN #2.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 21 | May 6 | Apr 25 | Sep 30 | Oct 13 | Oct 27 |
| 32°F | May 11 | Apr 27 | Apr 12 | Oct 10 | Oct 25 | Nov 7 |
| 28°F | Apr 30 | Apr 15 | Apr 1 | Oct 24 | Nov 6 | Nov 21 |
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 Oak Park, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 15 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.
Oak Park planting FAQ
When is the last spring frost in Oak Park, MI?
On average, the last spring frost in Oak Park is around April 27 (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 Oak Park, MI?
Expect Oak Park's first fall frost near October 25 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Oak Park in?
Oak Park is in USDA hardiness zone 6b. In zone 6b, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Oak Park?
There are roughly 181 frost-free days in Oak Park (a moderate growing season), running from the average last frost around April 27 to the first fall frost near October 25.
When should I plant tomatoes in Oak Park?
In Oak Park, 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 Oak Park
An email when it’s time to start seeds, transplant, and sow — timed to Oak Park’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Berkley · 4 km
- Ferndale · 4 km
- Royal Oak · 5 km
- Southfield · 6 km
- Hazel Park · 7 km
- Beverly Hills · 8 km
- Madison Heights · 8 km
- Clawson · 8 km
Frost dates recorded at DEARBORN #2, 13 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 Oak Park, MI — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00202016. Retrieved from https://blissgarden.com/michigan/oak-park.