| 2023 Hardiness Zone: | Zone 9a: 20°F to 25°F Zone 9b: 25°F to 30°F | |
| 2012 Hardiness Zone: | Zone 9a: 20°F to 25°F Zone 9b: 25°F to 30°F | |
| 1990 Hardiness Zone: | Zone 9a: 20F to 25F | |
| Average First Frost Date: | Jan. 1 - Jan. 10 | |
| Average Last Frost Date: | Jan. 21 - Jan. 31 | |
| Koppen-Geiger Climate Zone: | BSh - Hot Semi-Arid Climate | |
| Ecoregion: | ||
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 151 - 180 days Over 86°F |
Annual Climate Data for ZIP Code 85745 - Tucson, AZ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 38 | 41 | 45 | 50 | 58 | 68 | 73 | 72 | 67 | 56 | 44 | 38 | 54 |
| Avg Max Temp (°F) | 66 | 70 | 75 | 83 | 91 | 100 | 101 | 99 | 95 | 86 | 74 | 66 | 84 |
| Avg Precip (In.) | 1.01 | .99 | .92 | .34 | .21 | .28 | 1.99 | 2.18 | 1.19 | 1.1 | .73 | 1.08 | 12.02 |