South Gate, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 13.1 °C (low) to 23.7 °C (high). Annual precipitation averages 354.6 Millimeters. South Gate is located in USDA Plant Hardiness Zone 10b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 8.7 °C | 19.7 °C | 82.3 mm |
| February | 9.3 °C | 19.7 °C | 90.93 mm |
| March | 10.6 °C | 20.3 °C | 57.15 mm |
| April | 11.8 °C | 22.3 °C | 18.54 mm |
| May | 14 °C | 23.3 °C | 7.11 mm |
| June | 15.9 °C | 25.1 °C | 1.78 mm |
| July | 17.7 °C | 27.9 °C | 1.27 mm |
| August | 18.1 °C | 28.8 °C | 0.51 mm |
| September | 17.3 °C | 28.4 °C | 3.05 mm |
| October | 14.8 °C | 26.1 °C | 13.46 mm |
| November | 11.1 °C | 22.6 °C | 19.81 mm |
| December | 8.4 °C | 19.6 °C | 58.67 mm |
| Annual | 13.1 °C | 23.7 °C | 354.58 mm |
| Average First Frost Date | No Frost |
| 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 |