When to plant in Streamwood, IL
USDA Zone 5bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Streamwood, Illinois — all computed from Streamwood's nearest NOAA weather station.
Zone 5b means Streamwood sees real winter cold, but a good range of perennials survive; the frost dates above govern when annual vegetables go out.
The average last spring frost in Streamwood is now 11 days earlier than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
STREAMWOOD · 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 Streamwood’s own odds, recorded at STREAMWOOD.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 29 | May 12 | Apr 28 | Sep 21 | Oct 4 | Oct 16 |
| 32°F | May 16 | Apr 30 | Apr 17 | Sep 29 | Oct 13 | Oct 25 |
| 28°F | May 3 | Apr 20 | Apr 6 | Oct 8 | Oct 24 | Nov 5 |
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 Streamwood, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 11 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.
Streamwood planting FAQ
When is the last spring frost in Streamwood, IL?
Streamwood's average last spring frost falls near April 30 — the 50% mark at 32°F in the 1991–2020 normals. Hold tender transplants until the risk has passed, then plant out.
When is the first fall frost in Streamwood, IL?
In Streamwood, the first 32°F freeze of fall lands around October 13 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Streamwood in?
Streamwood 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 Streamwood?
There are roughly 166 frost-free days in Streamwood (a moderate growing season), running from the average last frost around April 30 to the first fall frost near October 13.
When should I plant tomatoes in Streamwood?
In Streamwood, start tomato seeds indoors around March 5–March 19, then transplant seedlings outdoors around May 7 once the danger of frost has passed.
Never miss a window in Streamwood
An email when it’s time to start seeds, transplant, and sow — timed to Streamwood’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Hanover Park · 5 km
- Hoffman Estates · 6 km
- Bartlett · 7 km
- Schaumburg · 8 km
- Roselle · 9 km
- Bloomingdale · 11 km
- Carol Stream · 12 km
- South Elgin · 12 km
Frost dates recorded at STREAMWOOD, 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 Streamwood, IL — Frost Dates & Zone 5b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00118324. Retrieved from https://blissgarden.com/illinois/streamwood.