Rutherford, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 45.6 °F (low) to 73.1 °F (high). Annual precipitation averages 34.2 Inches. Rutherford is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Feb. 11 - Feb. 20 through the first frost around Dec. 1 - Dec. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 38.1 °F | 58.4 °F | 7.06 in. |
| February | 39.8 °F | 61.4 °F | 7.07 in. |
| March | 41.7 °F | 65.7 °F | 4.19 in. |
| April | 43.7 °F | 70.7 °F | 2.08 in. |
| May | 47.7 °F | 76.8 °F | 0.99 in. |
| June | 51.2 °F | 83.4 °F | 0.19 in. |
| July | 53.7 °F | 87.1 °F | 0.0 in. |
| August | 53.3 °F | 86.8 °F | 0.04 in. |
| September | 51.2 °F | 85.5 °F | 0.08 in. |
| October | 47.2 °F | 77.4 °F | 1.55 in. |
| November | 41.5 °F | 65.8 °F | 2.97 in. |
| December | 38.0 °F | 58.0 °F | 7.93 in. |
| Annual | 45.6 °F | 73.1 °F | 34.15 in. |
| Average First Frost Date | Dec. 1 - Dec. 10 |
| Average Last Frost Date | Feb. 11 - Feb. 20 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9b : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9b : 25°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |