Frost dates for Canelo 1 NW, AZ
At Canelo 1 NW, the median last spring frost (32°F) is Apr 23 and the median first fall frost is Oct 30, for a typical growing season of 188 days. For a 90% chance that the last frost has passed, wait until May 7. Nearby ZIP codes are in USDA hardiness zones 8a to 8b.
- Apr 23Last spring frost (median)50% chance of 32°F after this date
- May 7Safer planting date10% chance of 32°F after this date
- Oct 30First fall frost (median)50% chance of 32°F by this date
- 188 daysGrowing season (median)between 32°F freezes
Last spring frost dates
The chance that the temperature drops to the threshold after each date.
| Temperature | 90% chance later | 50% chance later | 10% chance later |
|---|---|---|---|
| 36°F | Apr 24 | May 5 | May 21 |
| 32°F | Apr 8 | Apr 23 | May 7 |
| 28°F | Mar 18 | Apr 7 | Apr 24 |
| 24°F | Feb 17 | Mar 16 | Apr 10 |
First fall frost dates
The chance that the temperature has dropped to the threshold by each date.
| Temperature | 10% chance by | 50% chance by | 90% chance by |
|---|---|---|---|
| 36°F | Oct 7 | Oct 20 | Nov 2 |
| 32°F | Oct 17 | Oct 30 | Nov 13 |
| 28°F | Oct 26 | Nov 9 | Nov 25 |
| 24°F | Nov 5 | Nov 21 | Dec 7 |
Growing season length
Days between the last spring and first fall freeze, as the length reached in 9, 5 and 1 out of 10 years.
| Temperature | 9 in 10 years at least | 5 in 10 years at least | 1 in 10 years at least |
|---|---|---|---|
| 36°F | 144 days | 165 days | 184 days |
| 32°F | 167 days | 188 days | 209 days |
| 28°F | 190 days | 214 days | 241 days |
| 24°F | 220 days | 249 days | 279 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
Closest ZIP codes (each is closer to another station)
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 85611 | 8a | 10 to 15°F | 10 km |
| 85613 | 8b | 15 to 20°F | 11 km |
| 85624 | 8a | 10 to 15°F | 19 km |
| 85637 | 8a | 10 to 15°F | 24 km |
| 85616 | 8b | 15 to 20°F | 25 km |
| 85650 | 8b | 15 to 20°F | 32 km |
| 85635 | 8b | 15 to 20°F | 34 km |
| 85615 | 8b | 15 to 20°F | 35 km |
Not the official USDA Plant Hardiness Zone Map. Zones shown here are the values published in the USDA-ARS / Oregon State University PRISM Group 2023 ZIP code tables, shown unaltered. For the official interactive map, visit planthardiness.ars.usda.gov.
About this station
- NOAA station ID USC00021231, at 31.5589, -110.5294, elevation 1527 m (5,010 ft).
- Data quality: Representative (10+ years), 14 years of freeze data.
- Average days per year at or below 32°F: 102.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Elgin 5 S (4 km)
- Fort Huachuca Pioneer Airfield (11 km)
- Sonoita (18 km)
- Sierra Vista (24 km)
- Nogales Intl Airport (34 km)
- Kartchner Caverns (35 km)
- Coronado Nmem (35 km)
- Santa Rita Exp. Range (38 km)
Sources
- NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020, annual/seasonal normals by station (version 1.0.1), file dated June 27, 2023; documentation.
- USDA Agricultural Research Service and PRISM Group, Oregon State University, 2023 Plant Hardiness Zone Map ZIP code tables (CONUS, Alaska, Hawaii, Puerto Rico), files dated November 17, 2023. Data © PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed November 1, 2026. Official map: planthardiness.ars.usda.gov.
- U.S. Census Bureau, 2024 Gazetteer ZIP Code Tabulation Areas file, dated August 30, 2024 (ZIP centroids used to find the nearest station).
Freeze dates are 30-year probabilities, not forecasts. Check your local forecast before planting tender plants.