Alhambra, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 12.5 °C (low) to 25.5 °C (high). Annual precipitation averages 458.7 Millimeters. Alhambra is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 8.1 °C | 20.6 °C | 108.46 mm |
| February | 8.6 °C | 20.6 °C | 115.32 mm |
| March | 9.8 °C | 21.8 °C | 80.77 mm |
| April | 11.2 °C | 24.4 °C | 22.35 mm |
| May | 13.3 °C | 25.4 °C | 11.43 mm |
| June | 15.3 °C | 27.8 °C | 3.05 mm |
| July | 17.3 °C | 30.6 °C | 1.02 mm |
| August | 17.7 °C | 31.9 °C | 0.51 mm |
| September | 16.9 °C | 31.2 °C | 3.81 mm |
| October | 14.1 °C | 28.1 °C | 16.76 mm |
| November | 10.3 °C | 23.8 °C | 21.08 mm |
| December | 7.6 °C | 20.2 °C | 74.17 mm |
| Annual | 12.5 °C | 25.5 °C | 458.73 mm |
| Average First Frost Date | No Frost |
| Average Last Frost Date | |
| Average Days With Frost | Frost Free |
| Plant Hardiness Zone | Zone 10a : -1.1°C to 1.7°C |
| Plant Hardiness Zone - 2012 | Zone 10a : -1.1°C to 1.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |