Bonny Doon, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 9.6 °C (low) to 19.7 °C (high). Annual precipitation averages 1322.6 Millimeters. Bonny Doon is located in USDA Plant Hardiness Zone 10a. The growing season typically runs from the last frost around Feb. 11 - Feb. 20 through the first frost around Dec. 21 - Dec. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 6.4 °C | 13.9 °C | 262.13 mm |
| February | 5.9 °C | 14.9 °C | 286 mm |
| March | 6.9 °C | 16.1 °C | 188.72 mm |
| April | 7.5 °C | 18.1 °C | 87.88 mm |
| May | 8.9 °C | 19.7 °C | 35.31 mm |
| June | 11.5 °C | 22.3 °C | 9.91 mm |
| July | 13.6 °C | 25.9 °C | 1.27 mm |
| August | 13.6 °C | 26.3 °C | 1.78 mm |
| September | 13.4 °C | 25.3 °C | 4.57 mm |
| October | 11.7 °C | 22.7 °C | 60.2 mm |
| November | 9 °C | 17.7 °C | 119.89 mm |
| December | 7.1 °C | 13.9 °C | 264.92 mm |
| Annual | 9.6 °C | 19.7 °C | 1322.58 mm |
| Average First Frost Date | Dec. 21 - Dec. 31 |
| Average Last Frost Date | Feb. 11 - Feb. 20 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 10a : -1.1°C to 1.7°C |
| Plant Hardiness Zone - 2012 | Zone 10b : 1.7°C to 4.4°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |