Ballard, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 46.2 °F (low) to 74.3 °F (high). Annual precipitation averages 18.6 Inches. Ballard is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 1 - Feb. 10 through the first frost around Dec. 21 - Dec. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 39.8 °F | 64.8 °F | 4.23 in. |
| February | 41.2 °F | 64.9 °F | 4.24 in. |
| March | 42.5 °F | 66.9 °F | 3.45 in. |
| April | 43.7 °F | 71.3 °F | 1.14 in. |
| May | 47.0 °F | 74.9 °F | 0.43 in. |
| June | 49.9 °F | 79.4 °F | 0.06 in. |
| July | 53.4 °F | 84.6 °F | 0.04 in. |
| August | 53.9 °F | 85.4 °F | 0.01 in. |
| September | 52.2 °F | 84.5 °F | 0.07 in. |
| October | 48.5 °F | 79.7 °F | 0.76 in. |
| November | 42.9 °F | 71.0 °F | 1.32 in. |
| December | 39.1 °F | 64.5 °F | 2.86 in. |
| Annual | 46.2 °F | 74.3 °F | 18.61 in. |
| Average First Frost Date | Dec. 21 - Dec. 31 |
| Average Last Frost Date | Feb. 1 - Feb. 10 |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 9b : 25°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |