Ridgemark, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 7.2 °C (low) to 22 °C (high). Annual precipitation averages 375.9 Millimeters. 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 | 3.3 °C | 15.7 °C | 77.47 mm |
| February | 4.2 °C | 16.9 °C | 76.45 mm |
| March | 5.2 °C | 19.1 °C | 54.86 mm |
| April | 6.1 °C | 20.7 °C | 25.91 mm |
| May | 8.2 °C | 22.9 °C | 13.21 mm |
| June | 9.8 °C | 25.6 °C | 1.78 mm |
| July | 11.4 °C | 27 °C | 0.25 mm |
| August | 11.6 °C | 27.7 °C | 0.51 mm |
| September | 10.7 °C | 27.8 °C | 1.78 mm |
| October | 8.3 °C | 25.1 °C | 19.05 mm |
| November | 5.1 °C | 19.8 °C | 35.81 mm |
| December | 2.9 °C | 15.6 °C | 68.83 mm |
| Annual | 7.2 °C | 22 °C | 375.91 mm |
| 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 : -3.9°C to -1.1°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |