Scotts Valley, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 7.7 °C (low) to 21.6 °C (high). Annual precipitation averages 1164.4 Millimeters. Scotts Valley 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. 21 - Dec. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 4.3 °C | 15.4 °C | 228.35 mm |
| February | 4.9 °C | 16.3 °C | 257.05 mm |
| March | 5.7 °C | 18.3 °C | 159.77 mm |
| April | 6.4 °C | 20.9 °C | 68.33 mm |
| May | 8.3 °C | 23.2 °C | 27.18 mm |
| June | 9.7 °C | 25.3 °C | 7.37 mm |
| July | 11.6 °C | 26.8 °C | 0.76 mm |
| August | 11.5 °C | 27.2 °C | 2.03 mm |
| September | 10.8 °C | 27.3 °C | 5.59 mm |
| October | 8.7 °C | 25.1 °C | 46.48 mm |
| November | 6.3 °C | 18.6 °C | 122.68 mm |
| December | 4.2 °C | 14.7 °C | 238.76 mm |
| Annual | 7.7 °C | 21.6 °C | 1164.35 mm |
| Average First Frost Date | Dec. 21 - Dec. 31 |
| Average Last Frost Date | Feb. 11 - Feb. 20 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9b : -3.9°C to -1.1°C |
| Plant Hardiness Zone - 2012 | Zone 9b : -3.9°C to -1.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |