Potter Valley, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 6.1 °C (low) to 23 °C (high). Annual precipitation averages 1003.8 Millimeters. Potter Valley is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.9 °C | 13.5 °C | 198.63 mm |
| February | 2.4 °C | 15.3 °C | 152.65 mm |
| March | 3.6 °C | 17.7 °C | 131.83 mm |
| April | 4.7 °C | 20.2 °C | 72.39 mm |
| May | 7.1 °C | 24.6 °C | 39.62 mm |
| June | 9.8 °C | 29.3 °C | 15.24 mm |
| July | 12.2 °C | 34.1 °C | 3.81 mm |
| August | 11.4 °C | 33.8 °C | 5.59 mm |
| September | 9.2 °C | 31.4 °C | 5.33 mm |
| October | 6.3 °C | 25.5 °C | 54.61 mm |
| November | 3.4 °C | 17.4 °C | 117.86 mm |
| December | 1.4 °C | 13.1 °C | 206.25 mm |
| Annual | 6.1 °C | 23 °C | 1003.81 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |