| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 9b: 25°F to 30°F Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F Zone 8b: 15°F to 20°F Zone 8a: 10°F to 15°F Zone 9a: 20°F to 25°F | |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 9a: 20°F to 25°F Zone 8a: 10°F to 15°F Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F | |
| 1990 Hardiness Zone: | Zone 8a: 10F to 15F | |
| Average First Frost Date: | Oct. 21 - Oct. 31 | |
| Average Last Frost Date: | Apr. 21 - Apr. 30 | |
| Koppen-Geiger Climate Zone: | BSh - Hot Semi-Arid Climate | |
| Ecoregion: | ||
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 121 - 150 days Over 86°F |
Annual Climate Data for ZIP Code 85643 - Willcox, AZ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 28 | 30 | 34 | 39 | 47 | 56 | 64 | 63 | 56 | 44 | 33 | 27 | 43 |
| Avg Max Temp (°F) | 60 | 65 | 71 | 79 | 87 | 93 | 95 | 93 | 89 | 80 | 68 | 60 | 78 |
| Avg Precip (In.) | 1.08 | .91 | .65 | .25 | .34 | .4 | 2.33 | 2.61 | 1.26 | 1.33 | .7 | 1.24 | 13.11 |