Ridgemark, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 45 °F (low) to 71.6 °F (high). Annual precipitation averages 14.8 Inches. Ridgemark 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 | 38.0 °F | 60.2 °F | 3.05 in. |
| February | 39.6 °F | 62.4 °F | 3.01 in. |
| March | 41.3 °F | 66.4 °F | 2.16 in. |
| April | 42.9 °F | 69.2 °F | 1.02 in. |
| May | 46.8 °F | 73.2 °F | 0.52 in. |
| June | 49.7 °F | 78.1 °F | 0.07 in. |
| July | 52.6 °F | 80.6 °F | 0.01 in. |
| August | 52.8 °F | 81.8 °F | 0.02 in. |
| September | 51.2 °F | 82.1 °F | 0.07 in. |
| October | 46.9 °F | 77.2 °F | 0.75 in. |
| November | 41.1 °F | 67.7 °F | 1.41 in. |
| December | 37.2 °F | 60.0 °F | 2.71 in. |
| Annual | 45 °F | 71.6 °F | 14.8 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 9a : 20°F to 25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |