| 2023 Hardiness Zone: | Zone 10b: 35°F to 40°F Zone 10a: 30°F to 35°F | |
| 2012 Hardiness Zone: | Zone 10b: 35°F to 40°F Zone 10a: 30°F to 35°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 91732 - El Monte, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 43 | 45 | 47 | 49 | 54 | 58 | 61 | 62 | 60 | 54 | 47 | 42 | 52 |
| Avg Max Temp (°F) | 69 | 70 | 71 | 75 | 77 | 82 | 87 | 88 | 87 | 81 | 75 | 70 | 78 |
| Avg Precip (In.) | 3.68 | 3.94 | 3.22 | .82 | .32 | .08 | .02 | .11 | .31 | .48 | 1.2 | 1.98 | 16.17 |