When to plant in Streator, IL
USDA Zone 5bStreator, Illinois frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
In zone 5b, Streator gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
Frost probability
STREATOR 3 SE · 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 Streator’s own odds, recorded at STREATOR 3 SE.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 8 | Apr 23 | Apr 9 | Oct 1 | Oct 18 | Oct 30 |
| 32°F | Apr 25 | Apr 12 | Mar 30 | Oct 16 | Oct 28 | Nov 11 |
| 28°F | Apr 15 | Apr 1 | Mar 16 | Oct 27 | Nov 8 | Nov 25 |
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 Streator, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 24 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.
Streator planting FAQ
When is the last spring frost in Streator, IL?
On average, the last spring frost in Streator is around April 12 (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 Streator, IL?
In Streator, the first 32°F freeze of fall lands around October 28 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Streator in?
Streator 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 Streator?
Streator has about 199 frost-free days — a moderate growing season — between the average last spring frost (April 12) and first fall frost (October 28).
When should I plant tomatoes in Streator?
For Streator, sow tomatoes indoors about February 15–March 1 and move the seedlings out around April 19, after the last spring frost.
Never miss a window in Streator
An email when it’s time to start seeds, transplant, and sow — timed to Streator’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reachFrost dates recorded at STREATOR 3 SE, 4 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 Streator, IL — Frost Dates & Zone 5b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00118353. Retrieved from https://blissgarden.com/illinois/streator.