When to plant in Marquette, MI
USDA Zone 5bEverything below — frost dates, hardiness zone, and what to plant when in Marquette, Michigan — is derived from the closest NOAA station with complete climate normals.
Zone 5b means Marquette sees real winter cold, but a good range of perennials survive; the frost dates above govern when annual vegetables go out.
Frost probability
MARQUETTE · 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 Marquette’s own odds, recorded at MARQUETTE.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Jun 6 | May 23 | May 7 | Sep 26 | Oct 8 | Oct 23 |
| 32°F | May 23 | May 8 | Apr 26 | Oct 6 | Oct 21 | Nov 5 |
| 28°F | May 11 | Apr 27 | Apr 11 | Oct 19 | Nov 2 | Nov 16 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 20Full-year planting calendar
Each bar is the exact window to take a planting action in Marquette, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 23 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.
Marquette planting FAQ
When is the last spring frost in Marquette, MI?
Plan for the last spring frost in Marquette around May 8 (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 Marquette, MI?
The first fall frost in Marquette typically arrives around October 21 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Marquette in?
Marquette 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 Marquette?
There are roughly 166 frost-free days in Marquette (a moderate growing season), running from the average last frost around May 8 to the first fall frost near October 21.
When should I plant tomatoes in Marquette?
In Marquette, start tomato seeds indoors around March 13–March 27, then transplant seedlings outdoors around May 15 once the danger of frost has passed.
Never miss a window in Marquette
An email when it’s time to start seeds, transplant, and sow — timed to Marquette’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reachFrost dates recorded at MARQUETTE, 1 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 Marquette, MI — Frost Dates & Zone 5b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00014838. Retrieved from https://blissgarden.com/michigan/marquette.