| 2023 Hardiness Zone: | Zone 10b: 35°F to 40°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: | 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 91733 - South El Monte, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 44 | 46 | 48 | 50 | 55 | 58 | 62 | 63 | 61 | 55 | 48 | 43 | 53 |
| Avg Max Temp (°F) | 69 | 70 | 71 | 75 | 77 | 82 | 86 | 88 | 86 | 81 | 74 | 70 | 77 |
| Avg Precip (In.) | 3.41 | 3.89 | 3.11 | .76 | .28 | .08 | .02 | .11 | .34 | .42 | 1.18 | 1.86 | 15.46 |