When to plant in Nogales, AZ
USDA Zone 8bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Nogales, Arizona — all computed from Nogales's nearest NOAA weather station.
Nogales enjoys a long ~242-day frost-free season — you can succession-sow, fit in a second crop, and grow long-season heat-lovers with room to spare. Zone 8b means many perennials and even some tender shrubs overwinter in Nogales, while your frost dates still decide when annuals go out.
The average last spring frost in Nogales is now 6 days earlier than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
NOGALES INTL AP · 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 Nogales’s own odds, recorded at NOGALES INTL AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 29 | Apr 13 | Mar 24 | Oct 20 | Nov 5 | Nov 20 |
| 32°F | Apr 13 | Mar 20 | Feb 24 | Oct 30 | Nov 17 | Dec 3 |
| 28°F | Mar 21 | Feb 23 | Jan 25 | Nov 11 | Nov 30 | Dec 17 |
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 Nogales, 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.
Nogales planting FAQ
When is the last spring frost in Nogales, AZ?
Plan for the last spring frost in Nogales around March 20 (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 Nogales, AZ?
Expect Nogales's first fall frost near November 17 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Nogales in?
Nogales is in USDA hardiness zone 8b. In zone 8b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Nogales?
There are roughly 242 frost-free days in Nogales (a long growing season), running from the average last frost around March 20 to the first fall frost near November 17.
When should I plant tomatoes in Nogales?
In Nogales, start tomato seeds indoors around January 23–February 6, then transplant seedlings outdoors around March 27 once the danger of frost has passed.
Never miss a window in Nogales
An email when it’s time to start seeds, transplant, and sow — timed to Nogales’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Rio Rico · 16 km
- Green Valley · 54 km
- Sierra Vista · 63 km
- Sahuarita · 63 km
- Sierra Vista Southeast · 69 km
- Vail · 77 km
- Valencia West · 88 km
- Drexel Heights · 88 km
Frost dates recorded at NOGALES INTL AP, 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 Nogales, AZ — Frost Dates & Zone 8b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00003196. Retrieved from https://blissgarden.com/arizona/nogales.