Glendale, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 54.2 °F (low) to 77.2 °F (high). Annual precipitation averages 17.8 Inches. Glendale is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 46.3 °F | 68.4 °F | 4.3 in. |
| February | 47.1 °F | 68.3 °F | 4.51 in. |
| March | 49.3 °F | 70.2 °F | 2.96 in. |
| April | 51.8 °F | 75.0 °F | 0.93 in. |
| May | 55.7 °F | 76.8 °F | 0.43 in. |
| June | 59.3 °F | 81.5 °F | 0.08 in. |
| July | 63.0 °F | 86.0 °F | 0.04 in. |
| August | 63.6 °F | 88.9 °F | 0.02 in. |
| September | 61.9 °F | 87.9 °F | 0.19 in. |
| October | 57.1 °F | 81.9 °F | 0.67 in. |
| November | 50.1 °F | 74.2 °F | 0.98 in. |
| December | 45.5 °F | 67.8 °F | 2.68 in. |
| Annual | 54.2 °F | 77.2 °F | 17.79 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 |