| 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. 11 - Jan. 20 | |
| 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 85742 - Tucson, AZ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 36 | 39 | 43 | 48 | 56 | 67 | 73 | 72 | 66 | 54 | 43 | 37 | 53 |
| Avg Max Temp (°F) | 67 | 71 | 75 | 83 | 92 | 101 | 102 | 100 | 96 | 87 | 75 | 66 | 85 |
| Avg Precip (In.) | .95 | 1 | .97 | .37 | .19 | .31 | 1.98 | 2.16 | 1.08 | 1.01 | .73 | 1.09 | 11.84 |