When to plant in Godfrey, IL
USDA Zone 6bGodfrey, 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 6b, Godfrey gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
Frost probability
ALTON - MELVIN PRICE L&D · 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 Godfrey’s own odds, recorded at ALTON - MELVIN PRICE L&D.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 1 | Apr 14 | Mar 31 | Oct 12 | Oct 27 | Nov 8 |
| 32°F | Apr 19 | Apr 4 | Mar 18 | Oct 25 | Nov 5 | Nov 21 |
| 28°F | Apr 9 | Mar 25 | Mar 6 | Nov 2 | Nov 16 | Dec 1 |
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 Godfrey, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 20 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.
Godfrey planting FAQ
When is the last spring frost in Godfrey, IL?
Godfrey's average last spring frost falls near April 4 — 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 Godfrey, IL?
The first fall frost in Godfrey typically arrives around November 5 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Godfrey in?
Godfrey is in USDA hardiness zone 6b. In zone 6b, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Godfrey?
Godfrey has about 215 frost-free days — a long growing season — between the average last spring frost (April 4) and first fall frost (November 5).
When should I plant tomatoes in Godfrey?
For Godfrey, sow tomatoes indoors about February 7–February 21 and move the seedlings out around April 11, after the last spring frost.
Never miss a window in Godfrey
An email when it’s time to start seeds, transplant, and sow — timed to Godfrey’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Alton · 8 km
- Old Jamestown · 14 km
- Wood River · 16 km
- Spanish Lake · 18 km
- Florissant · 19 km
- Bellefontaine Neighbors · 22 km
- Hazelwood · 23 km
- Ferguson · 24 km
Frost dates recorded at ALTON - MELVIN PRICE L&D, 11 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 Godfrey, IL — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00110137. Retrieved from https://blissgarden.com/illinois/godfrey.