Richmond, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 50.8 °F (low) to 66.1 °F (high). Annual precipitation averages 24 Inches. Richmond is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 44.7 °F | 56.8 °F | 4.85 in. |
| February | 46.3 °F | 60.1 °F | 4.82 in. |
| March | 47.6 °F | 62.8 °F | 3.46 in. |
| April | 49.1 °F | 65.2 °F | 1.4 in. |
| May | 51.7 °F | 67.8 °F | 0.75 in. |
| June | 54.1 °F | 71.0 °F | 0.19 in. |
| July | 55.5 °F | 70.8 °F | 0.01 in. |
| August | 56.4 °F | 72.0 °F | 0.04 in. |
| September | 56.2 °F | 73.9 °F | 0.08 in. |
| October | 53.8 °F | 72.2 °F | 0.99 in. |
| November | 49.1 °F | 63.8 °F | 2.39 in. |
| December | 45.0 °F | 57.2 °F | 5.06 in. |
| Annual | 50.8 °F | 66.1 °F | 24.04 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 | Csb - Warm-Summer Mediterranean Climate |