Hawthorne, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 13.4 °C (low) to 21.7 °C (high). Annual precipitation averages 334.3 Millimeters. Hawthorne is located in USDA Plant Hardiness Zone 10b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 9.4 °C | 18.8 °C | 78.49 mm |
| February | 9.9 °C | 18.7 °C | 85.6 mm |
| March | 10.9 °C | 19.1 °C | 52.58 mm |
| April | 12.1 °C | 20.4 °C | 16 mm |
| May | 14 °C | 21.3 °C | 6.6 mm |
| June | 15.9 °C | 22.6 °C | 1.52 mm |
| July | 17.6 °C | 24.5 °C | 1.02 mm |
| August | 17.9 °C | 25.2 °C | 0.51 mm |
| September | 17.2 °C | 25.2 °C | 3.05 mm |
| October | 15.1 °C | 24 °C | 13.72 mm |
| November | 11.7 °C | 21.4 °C | 17.78 mm |
| December | 9.3 °C | 18.8 °C | 57.4 mm |
| Annual | 13.4 °C | 21.7 °C | 334.27 mm |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Free |
| Plant Hardiness Zone | Zone 10b : 1.7°C to 4.4°C |
| Plant Hardiness Zone - 2012 | Zone 10b : 1.7°C to 4.4°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |