West Covina, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 54.4 °F (low) to 79.6 °F (high). Annual precipitation averages 15.7 Inches. West Covina is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 46.6 °F | 69.4 °F | 3.6 in. |
| February | 47.4 °F | 69.6 °F | 4.1 in. |
| March | 49.4 °F | 71.9 °F | 2.39 in. |
| April | 51.6 °F | 76.6 °F | 0.83 in. |
| May | 55.9 °F | 79.4 °F | 0.38 in. |
| June | 59.5 °F | 84.8 °F | 0.12 in. |
| July | 63.0 °F | 91.2 °F | 0.06 in. |
| August | 63.6 °F | 93.3 °F | 0.01 in. |
| September | 61.9 °F | 91.0 °F | 0.13 in. |
| October | 57.3 °F | 84.2 °F | 0.65 in. |
| November | 50.9 °F | 75.3 °F | 0.86 in. |
| December | 45.8 °F | 68.7 °F | 2.57 in. |
| Annual | 54.4 °F | 79.6 °F | 15.7 in. |
| Average First Frost Date | No Frost |
| Average Last Frost Date | |
| Average Days With Frost | Frost Free |
| Plant Hardiness Zone | Zone 10a : 30°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 10a : 30°F to 25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |