Quartz Hill, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 47.8 °F (low) to 76.7 °F (high). Annual precipitation averages 7.7 Inches. Quartz Hill is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 33.6 °F | 59.2 °F | 1.6 in. |
| February | 36.0 °F | 61.6 °F | 1.92 in. |
| March | 40.1 °F | 67.2 °F | 1.16 in. |
| April | 44.6 °F | 72.6 °F | 0.46 in. |
| May | 52.1 °F | 80.4 °F | 0.16 in. |
| June | 59.6 °F | 89.7 °F | 0.04 in. |
| July | 66.1 °F | 96.7 °F | 0.1 in. |
| August | 64.7 °F | 96.9 °F | 0.03 in. |
| September | 58.2 °F | 91.1 °F | 0.12 in. |
| October | 48.2 °F | 79.9 °F | 0.34 in. |
| November | 38.1 °F | 67.6 °F | 0.4 in. |
| December | 32.3 °F | 57.9 °F | 1.38 in. |
| Annual | 47.8 °F | 76.7 °F | 7.71 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |