When to plant in Vail, AZ
USDA Zone 9aHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Vail, Arizona — all computed from Vail's nearest NOAA weather station.
Vail enjoys a long ~324-day frost-free season — you can succession-sow, fit in a second crop, and grow long-season heat-lovers with room to spare. Vail's nearest full-normals station sits about 18 km out, so treat these as a close estimate — local microclimate can nudge your first and last frost. In zone 9a, frost is a minor factor for Vail — most perennials thrive, and annual vegetables can go out early and stay late.
Frost probability
SAGUARO NP · 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 Vail’s own odds, recorded at SAGUARO NP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Mar 18 | Feb 22 | Jan 22 | Nov 16 | Dec 2 | Dec 18 |
| 32°F | Feb 25 | Jan 26 | Dec 24 | Nov 26 | Dec 16 | Jan 17 |
| 28°F | Feb 9 | Jan 7 | Dec 14 | Dec 9 | Dec 28 | Feb 3 |
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 Vail, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 32 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.
Vail planting FAQ
When is the last spring frost in Vail, AZ?
Plan for the last spring frost in Vail around January 26 (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 Vail, AZ?
In Vail, the first 32°F freeze of fall lands around December 16 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Vail in?
Vail is in USDA hardiness zone 9a. In zone 9a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Vail?
Vail has about 324 frost-free days — a long growing season — between the average last spring frost (January 26) and first fall frost (December 16).
When should I plant tomatoes in Vail?
For Vail, sow tomatoes indoors about December 1–December 15 and move the seedlings out around February 2, after the last spring frost.
Never miss a window in Vail
An email when it’s time to start seeds, transplant, and sow — timed to Vail’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Tucson · 22 km
- Sahuarita · 27 km
- Tanque Verde · 28 km
- Green Valley · 36 km
- Catalina Foothills · 36 km
- Drexel Heights · 36 km
- Valencia West · 41 km
- Flowing Wells · 43 km
Frost dates recorded at SAGUARO NP, 18 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 Vail, AZ — Frost Dates & Zone 9a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00027398. Retrieved from https://blissgarden.com/arizona/vail.