| 2023 Hardiness Zone: | Zone 9b: 25°F to 30°F Zone 8a: 10°F to 15°F Zone 10b: 35°F to 40°F Zone 10a: 30°F to 35°F Zone 8b: 15°F to 20°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 10a: 30°F to 35°F Zone 9b: 25°F to 30°F | |
| 1990 Hardiness Zone: | Zone 10a: 30F to 35F | |
| Average First Frost Date: | Jan. 21 - Jan. 31 | |
| Average Last Frost Date: | Jan. 21 - Jan. 31 | |
| Koppen-Geiger Climate Zone: | Csa - Hot-Summer Mediterranean Climate | |
| Ecoregion: | ||
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 91702 - Azusa, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 42 | 44 | 45 | 48 | 52 | 56 | 60 | 61 | 59 | 53 | 46 | 42 | 51 |
| Avg Max Temp (°F) | 66 | 68 | 69 | 74 | 77 | 84 | 90 | 90 | 87 | 80 | 73 | 67 | 77 |
| Avg Precip (In.) | 4.01 | 4.15 | 3.49 | 1 | .46 | .14 | .04 | .15 | .4 | .59 | 1.38 | 2.23 | 18.03 |