Commerce, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 13.2 °C (low) to 24.1 °C (high). Annual precipitation averages 371.1 Millimeters. Commerce is located in USDA Plant Hardiness Zone 10b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 8.7 °C | 20.1 °C | 86.61 mm |
| February | 9.3 °C | 20 °C | 96.52 mm |
| March | 10.6 °C | 20.8 °C | 59.69 mm |
| April | 11.9 °C | 23.1 °C | 19.56 mm |
| May | 14.1 °C | 23.9 °C | 7.87 mm |
| June | 16 °C | 25.7 °C | 2.03 mm |
| July | 17.8 °C | 28.3 °C | 1.02 mm |
| August | 18.2 °C | 29.4 °C | 0.25 mm |
| September | 17.4 °C | 28.8 °C | 2.79 mm |
| October | 14.9 °C | 26.5 °C | 12.7 mm |
| November | 11.1 °C | 22.9 °C | 20.07 mm |
| December | 8.3 °C | 19.7 °C | 61.98 mm |
| Annual | 13.2 °C | 24.1 °C | 371.09 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 | Csa - Hot-Summer Mediterranean Climate |