When to plant in Alsip, IL
USDA Zone 6aEverything below — frost dates, hardiness zone, and what to plant when in Alsip, Illinois — is derived from the closest NOAA station with complete climate normals.
In zone 6a, Alsip gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
Frost probability
CHICAGO MIDWAY AP 3SW · 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 Alsip’s own odds, recorded at CHICAGO MIDWAY AP 3SW.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 6 | Apr 22 | Apr 9 | Oct 10 | Oct 22 | Nov 3 |
| 32°F | Apr 26 | Apr 10 | Mar 30 | Oct 21 | Nov 1 | Nov 16 |
| 28°F | Apr 14 | Apr 1 | Mar 15 | Oct 30 | Nov 11 | Nov 26 |
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 Alsip, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 13 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.
Alsip planting FAQ
When is the last spring frost in Alsip, IL?
Plan for the last spring frost in Alsip around April 10 (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 Alsip, IL?
Expect Alsip's first fall frost near November 1 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Alsip in?
Alsip is in USDA hardiness zone 6a. In zone 6a, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Alsip?
Alsip has about 205 frost-free days — a moderate growing season — between the average last spring frost (April 10) and first fall frost (November 1).
When should I plant tomatoes in Alsip?
For Alsip, sow tomatoes indoors about February 13–February 27 and move the seedlings out around April 17, after the last spring frost.
Never miss a window in Alsip
An email when it’s time to start seeds, transplant, and sow — timed to Alsip’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Crestwood · 3 km
- Blue Island · 5 km
- Palos Heights · 5 km
- Oak Lawn · 5 km
- Worth · 5 km
- Chicago Ridge · 5 km
- Midlothian · 5 km
- Evergreen Park · 6 km
Frost dates recorded at CHICAGO MIDWAY AP 3SW, 8 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 Alsip, IL — Frost Dates & Zone 6a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00111577. Retrieved from https://blissgarden.com/illinois/alsip.