When to plant in Minooka, IL
USDA Zone 5bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Minooka, Illinois — all computed from Minooka's nearest NOAA weather station.
In zone 5b, Minooka gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
The average last spring frost in Minooka is now 7 days earlier than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
CHANNAHON DRESDEN ISL DAM · 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 Minooka’s own odds, recorded at CHANNAHON DRESDEN ISL DAM.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 14 | Apr 30 | Apr 15 | Oct 1 | Oct 15 | Oct 28 |
| 32°F | May 3 | Apr 16 | Apr 3 | Oct 13 | Oct 26 | Nov 8 |
| 28°F | Apr 19 | Apr 5 | Mar 20 | Oct 24 | Nov 6 | Nov 23 |
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 Minooka, 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.
Minooka planting FAQ
When is the last spring frost in Minooka, IL?
Plan for the last spring frost in Minooka around April 16 (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 Minooka, IL?
The first fall frost in Minooka typically arrives around October 26 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Minooka in?
Minooka 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 Minooka?
Minooka has about 193 frost-free days — a moderate growing season — between the average last spring frost (April 16) and first fall frost (October 26).
When should I plant tomatoes in Minooka?
For Minooka, sow tomatoes indoors about February 19–March 5 and move the seedlings out around April 23, after the last spring frost.
Never miss a window in Minooka
An email when it’s time to start seeds, transplant, and sow — timed to Minooka’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Channahon · 3 km
- Shorewood · 9 km
- Joliet · 13 km
- Morris · 14 km
- Plainfield · 19 km
- Crest Hill · 19 km
- Romeoville · 25 km
- Manhattan · 25 km
Frost dates recorded at CHANNAHON DRESDEN ISL DAM, 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 Minooka, IL — Frost Dates & Zone 5b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00111420. Retrieved from https://blissgarden.com/illinois/minooka.