When to plant in Antioch, IL
USDA Zone 5bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Antioch, Illinois — all computed from Antioch's nearest NOAA weather station.
In zone 5b, Antioch gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
The average first fall frost in Antioch is now 5 days later than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
ANTIOCH · 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 Antioch’s own odds, recorded at ANTIOCH.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 23 | May 5 | Apr 21 | Sep 28 | Oct 11 | Oct 23 |
| 32°F | May 9 | Apr 23 | Apr 9 | Oct 6 | Oct 21 | Nov 3 |
| 28°F | Apr 27 | Apr 11 | Mar 30 | Oct 17 | Nov 1 | Nov 15 |
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 Antioch, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 12 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.
Antioch planting FAQ
When is the last spring frost in Antioch, IL?
On average, the last spring frost in Antioch is around April 23 (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 Antioch, IL?
The first fall frost in Antioch typically arrives around October 21 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Antioch in?
Antioch 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 Antioch?
Antioch has about 181 frost-free days — a moderate growing season — between the average last spring frost (April 23) and first fall frost (October 21).
When should I plant tomatoes in Antioch?
For Antioch, sow tomatoes indoors about February 26–March 12 and move the seedlings out around April 30, after the last spring frost.
Never miss a window in Antioch
An email when it’s time to start seeds, transplant, and sow — timed to Antioch’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Lindenhurst · 7 km
- Salem Lakes · 9 km
- Round Lake Beach · 11 km
- Fox Lake · 11 km
- Round Lake · 15 km
- Grayslake · 15 km
- Gages Lake · 16 km
- Pleasant Prairie · 16 km
Frost dates recorded at ANTIOCH, 3 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 Antioch, IL — Frost Dates & Zone 5b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00110203. Retrieved from https://blissgarden.com/illinois/antioch.