Montebello, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 55.4 °F (low) to 77.2 °F (high). Annual precipitation averages 15.2 Inches. Montebello is located in USDA Plant Hardiness Zone 10b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 47.1 °F | 68.4 °F | 3.66 in. |
| February | 48.3 °F | 68.3 °F | 4.0 in. |
| March | 50.6 °F | 70.1 °F | 2.39 in. |
| April | 52.9 °F | 76.1 °F | 0.79 in. |
| May | 57.1 °F | 78.0 °F | 0.32 in. |
| June | 60.6 °F | 81.5 °F | 0.07 in. |
| July | 64.0 °F | 85.8 °F | 0.04 in. |
| August | 64.7 °F | 87.9 °F | 0.01 in. |
| September | 63.1 °F | 86.6 °F | 0.11 in. |
| October | 58.4 °F | 81.5 °F | 0.46 in. |
| November | 51.5 °F | 73.8 °F | 0.75 in. |
| December | 46.5 °F | 67.8 °F | 2.6 in. |
| Annual | 55.4 °F | 77.2 °F | 15.2 in. |
| Average First Frost Date | No Frost |
| Average Last Frost Date | |
| Average Days With Frost | Frost Free |
| Plant Hardiness Zone | Zone 10b : 35°F to 30°F |
| Plant Hardiness Zone - 2012 | Zone 10b : 35°F to 30°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |