When to plant in Avondale, AZ
USDA Zone 9bEverything below — frost dates, hardiness zone, and what to plant when in Avondale, Arizona — is derived from the closest NOAA station with complete climate normals.
Avondale enjoys a long ~342-day frost-free season — you can succession-sow, fit in a second crop, and grow long-season heat-lovers with room to spare. Heads up: the nearest complete-normals station is about 17 km from Avondale, so your yard's frost dates can differ — a low spot or a paved city center can shift them by a week. Zone 9b is warm enough that Avondale can grow subtropical perennials, and the short (or absent) frost period barely limits the annual calendar.
The average last spring frost in Avondale is now 7 days earlier than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
LAVEEN 3 SSE · 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 Avondale’s own odds, recorded at LAVEEN 3 SSE.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Mar 1 | Feb 6 | Jan 8 | Nov 22 | Dec 8 | Dec 24 |
| 32°F | Feb 12 | Jan 14 | Dec 19 | Dec 1 | Dec 22 | Jan 22 |
| 28°F | Feb 3 | Jan 5 | Dec 13 | Dec 11 | Jan 2 | Jan 30 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Nothing new to sow or transplant outdoors in the next few weeks — a seasonal lull. Check the full-year calendar below for the next window.
Full-year planting calendar
Each bar is the exact window to take a planting action in Avondale, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 25 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.
Avondale planting FAQ
When is the last spring frost in Avondale, AZ?
On average, the last spring frost in Avondale is around January 14 (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 Avondale, AZ?
The first fall frost in Avondale typically arrives around December 22 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Avondale in?
Avondale is in USDA hardiness zone 9b. In zone 9b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Avondale?
There are roughly 342 frost-free days in Avondale (a long growing season), running from the average last frost around January 14 to the first fall frost near December 22.
When should I plant tomatoes in Avondale?
In Avondale, start tomato seeds indoors around November 19–December 3, then transplant seedlings outdoors around January 21 once the danger of frost has passed.
Never miss a window in Avondale
An email when it’s time to start seeds, transplant, and sow — timed to Avondale’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reachFrost dates recorded at LAVEEN 3 SSE, 17 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 Avondale, AZ — Frost Dates & Zone 9b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00024829. Retrieved from https://blissgarden.com/arizona/avondale.