| 2023 Hardiness Zone: | Zone 10b: 35°F to 40°F Zone 10a: 30°F to 35°F | |
| 2012 Hardiness Zone: | Zone 10a: 30°F to 35°F | |
| 1990 Hardiness Zone: | Zone 10a: 30F to 35F | |
| Average First Frost Date: | No Frost | |
| Average Last Frost Date: | No Frost | |
| 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 91803 - Alhambra, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 45 | 47 | 49 | 52 | 56 | 59 | 63 | 64 | 62 | 57 | 49 | 45 | 54 |
| Avg Max Temp (°F) | 69 | 70 | 71 | 75 | 77 | 82 | 87 | 88 | 86 | 81 | 74 | 69 | 78 |
| Avg Precip (In.) | 3.91 | 4.35 | 3.59 | .96 | .35 | .14 | .03 | .15 | .38 | .53 | 1.26 | 2.11 | 17.77 |