When to plant in Yuma, AZ
USDA Zone 10aHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Yuma, Arizona — all computed from Yuma's nearest NOAA weather station.
With about 354 frost-free days, Yuma supports back-to-back plantings; stagger sowings every few weeks to keep beds productive spring through fall. Heads up: the nearest complete-normals station is about 25 km from Yuma, so your yard's frost dates can differ — a low spot or a paved city center can shift them by a week. In zone 10a, frost is a minor factor for Yuma — most perennials thrive, and annual vegetables can go out early and stay late.
Frost probability
YUMA QUARTERMASTER DEPOT · 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 Yuma’s own odds, recorded at YUMA QUARTERMASTER DEPOT.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Feb 28 | Jan 28 | Dec 25 | Nov 29 | Dec 16 | Jan 5 |
| 32°F | Feb 19 | Jan 8 | Dec 17 | Dec 11 | Dec 28 | Feb 7 |
| 28°F | Feb 16 | Jan 1 | Dec 19 | Dec 16 | Dec 31 | Feb 10 |
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 Yuma, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 47 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.
Yuma planting FAQ
When is the last spring frost in Yuma, AZ?
Yuma's average last spring frost falls near January 8 — 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 Yuma, AZ?
Expect Yuma's first fall frost near December 28 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Yuma in?
Yuma is in USDA hardiness zone 10a. In zone 10a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Yuma?
Yuma has about 354 frost-free days — a long growing season — between the average last spring frost (January 8) and first fall frost (December 28).
When should I plant tomatoes in Yuma?
For Yuma, sow tomatoes indoors about November 13–November 27 and move the seedlings out around January 15, after the last spring frost.
Never miss a window in Yuma
An email when it’s time to start seeds, transplant, and sow — timed to Yuma’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reachFrost dates recorded at YUMA QUARTERMASTER DEPOT, 25 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 Yuma, AZ — Frost Dates & Zone 10a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00029656. Retrieved from https://blissgarden.com/arizona/yuma.